.. DO NOT EDIT.
.. THIS FILE WAS AUTOMATICALLY GENERATED BY SPHINX-GALLERY.
.. TO MAKE CHANGES, EDIT THE SOURCE PYTHON FILE:
.. "examples/selection.py"
.. LINE NUMBERS ARE GIVEN BELOW.
.. only:: html
.. note::
:class: sphx-glr-download-link-note
:ref:`Go to the end <sphx_glr_download_examples_selection.py>`
to download the full example code.
.. rst-class:: sphx-glr-example-title
.. _sphx_glr_examples_selection.py:
Select unstructured data
========================
Xarray has flexible tools for label based selection, in the form of ``.sel``
and ``.isel`` for index selection. This works well for structured data since
the orthogonality of the x and y axes is reflected in the axes of the
underlying arrays. This orthogonality does not exist for unstructured grids, as
the data for all faces cannot be stored in a two-dimensional array and is
stored in a one-dimensional array instead.
Xugrid provides tools for convenient spatial selection, primarily via the
``.ugrid.sel`` method; its behavior is comparable to xarray's ``.sel`` method.
The ``.ugrid.sel`` method should only be used for selection in the x or y
dimension. Selections along other dimension (such as time) should be performed
by xarray's ``.sel`` instead (without the ``ugrid`` accessor).
The examples below demonstrate the various ways to select data.
Imports
-------
The following imports suffice for the examples.
.. GENERATED FROM PYTHON SOURCE LINES 27-33
.. code-block:: Python
import matplotlib.pyplot as plt
import numpy as np
import shapely
import xugrid as xu
.. GENERATED FROM PYTHON SOURCE LINES 34-36
We will take a look at a sample dataset: a triangular grid with the surface
elevation of the Netherlands.
.. GENERATED FROM PYTHON SOURCE LINES 36-40
.. code-block:: Python
uda = xu.data.elevation_nl()
uda.ugrid.plot(vmin=-20, vmax=90, cmap="terrain")
.. image-sg:: /examples/images/sphx_glr_selection_001.png
:alt: selection
:srcset: /examples/images/sphx_glr_selection_001.png
:class: sphx-glr-single-img
.. rst-class:: sphx-glr-script-out
.. code-block:: none
<matplotlib.collections.PolyCollection object at 0x7f74d4338e60>
.. GENERATED FROM PYTHON SOURCE LINES 41-57
We will start by demonstrating the behavior of ``.ugrid.sel``. This method
takes several types of arguments, like its xarray equivalent. The return type
and shape of the selection operation depends on the argument given.
========== ===========
Selection Result type
========== ===========
Subset xugrid
Point xarray
Line xarray
========== ===========
Grid subset selection
---------------------
A subset of the unstructured grid is returned by using slices without a step:
.. GENERATED FROM PYTHON SOURCE LINES 57-61
.. code-block:: Python
subset = uda.ugrid.sel(x=slice(100_000.0, 200_000.0), y=slice(450_000.0, 550_000.0))
subset.ugrid.plot(vmin=-20, vmax=90, cmap="terrain")
.. image-sg:: /examples/images/sphx_glr_selection_002.png
:alt: selection
:srcset: /examples/images/sphx_glr_selection_002.png
:class: sphx-glr-single-img
.. rst-class:: sphx-glr-script-out
.. code-block:: none
<matplotlib.collections.PolyCollection object at 0x7f74d32a1820>
.. GENERATED FROM PYTHON SOURCE LINES 62-64
The default arguments of ``x`` and ``y`` are: ``slice(None, None)``.
In such a case the entire grid is returned.
.. GENERATED FROM PYTHON SOURCE LINES 64-68
.. code-block:: Python
subset = uda.ugrid.sel()
subset.ugrid.plot(vmin=-20, vmax=90, cmap="terrain")
.. image-sg:: /examples/images/sphx_glr_selection_003.png
:alt: selection
:srcset: /examples/images/sphx_glr_selection_003.png
:class: sphx-glr-single-img
.. rst-class:: sphx-glr-script-out
.. code-block:: none
<matplotlib.collections.PolyCollection object at 0x7f74d2be92e0>
.. GENERATED FROM PYTHON SOURCE LINES 69-75
.. note::
``None`` in a Python slice can be interpreted as "from the start" or "up to
and including the end".
This means we can easily select along a single dimension:
.. GENERATED FROM PYTHON SOURCE LINES 75-79
.. code-block:: Python
subset = uda.ugrid.sel(x=slice(100_000.0, 200_000.0))
subset.ugrid.plot(vmin=-20, vmax=90, cmap="terrain", aspect=1, size=5)
.. image-sg:: /examples/images/sphx_glr_selection_004.png
:alt: selection
:srcset: /examples/images/sphx_glr_selection_004.png
:class: sphx-glr-single-img
.. rst-class:: sphx-glr-script-out
.. code-block:: none
<matplotlib.collections.PolyCollection object at 0x7f74d31b97c0>
.. GENERATED FROM PYTHON SOURCE LINES 80-81
Or, using ``None`` if we only care about the start:
.. GENERATED FROM PYTHON SOURCE LINES 81-85
.. code-block:: Python
subset = uda.ugrid.sel(x=slice(100_000.0, None))
subset.ugrid.plot(vmin=-20, vmax=90, cmap="terrain", aspect=1, size=5)
.. image-sg:: /examples/images/sphx_glr_selection_005.png
:alt: selection
:srcset: /examples/images/sphx_glr_selection_005.png
:class: sphx-glr-single-img
.. rst-class:: sphx-glr-script-out
.. code-block:: none
<matplotlib.collections.PolyCollection object at 0x7f74de05dc70>
.. GENERATED FROM PYTHON SOURCE LINES 86-94
Point selection
---------------
Since point data can be represented as an ordinary xarray DataArray with x
and y coordinates, all point selection result in xarray DataArrays rather
than UgridDataArrays with an associated unstructured grid topology.
We will use a utility function to show what is selected on the map:
.. GENERATED FROM PYTHON SOURCE LINES 94-103
.. code-block:: Python
def show_point_selection(uda, da):
_, ax = plt.subplots()
uda.ugrid.plot(ax=ax, vmin=-20, vmax=90, cmap="terrain")
ax.scatter(da["mesh2d_x"], da["mesh2d_y"], color="red")
ax.set_aspect(1.0)
.. GENERATED FROM PYTHON SOURCE LINES 104-105
Two values will select a point:
.. GENERATED FROM PYTHON SOURCE LINES 105-110
.. code-block:: Python
da = uda.ugrid.sel(x=150_000.0, y=463_000.0)
show_point_selection(uda, da)
da
.. image-sg:: /examples/images/sphx_glr_selection_006.png
:alt: selection
:srcset: /examples/images/sphx_glr_selection_006.png
:class: sphx-glr-single-img
.. raw:: html
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</style><pre class='xr-text-repr-fallback'><xarray.DataArray 'elevation' (mesh2d_nFaces: 1)> Size: 4B
[1 values with dtype=float32]
Coordinates:
mesh2d_face_x (mesh2d_nFaces) float64 8B ...
mesh2d_face_y (mesh2d_nFaces) float64 8B ...
* mesh2d_nFaces (mesh2d_nFaces) int64 8B 4221
mesh2d_index (mesh2d_nFaces) int64 8B 0
mesh2d_x (mesh2d_nFaces) float64 8B 1.5e+05
mesh2d_y (mesh2d_nFaces) float64 8B 4.63e+05
Attributes:
unit: m NAP</pre><div class='xr-wrap' style='display:none'><div class='xr-header'><div class='xr-obj-type'>xarray.DataArray</div><div class='xr-array-name'>'elevation'</div><ul class='xr-dim-list'><li><span class='xr-has-index'>mesh2d_nFaces</span>: 1</li></ul></div><ul class='xr-sections'><li class='xr-section-item'><div class='xr-array-wrap'><input id='section-2da244d2-f1b5-4c85-abd2-e51ba752723b' class='xr-array-in' type='checkbox' checked><label for='section-2da244d2-f1b5-4c85-abd2-e51ba752723b' title='Show/hide data repr'><svg class='icon xr-icon-database'><use xlink:href='#icon-database'></use></svg></label><div class='xr-array-preview xr-preview'><span>...</span></div><div class='xr-array-data'><pre>[1 values with dtype=float32]</pre></div></div></li><li class='xr-section-item'><input id='section-eb20a374-2505-4e8f-b544-6a48794085c6' class='xr-section-summary-in' type='checkbox' checked><label for='section-eb20a374-2505-4e8f-b544-6a48794085c6' class='xr-section-summary' >Coordinates: <span>(6)</span></label><div class='xr-section-inline-details'></div><div class='xr-section-details'><ul class='xr-var-list'><li class='xr-var-item'><div class='xr-var-name'><span>mesh2d_face_x</span></div><div class='xr-var-dims'>(mesh2d_nFaces)</div><div class='xr-var-dtype'>float64</div><div class='xr-var-preview xr-preview'>...</div><input id='attrs-665bab98-386d-4c28-b7e6-0271b21f6e21' class='xr-var-attrs-in' type='checkbox' ><label for='attrs-665bab98-386d-4c28-b7e6-0271b21f6e21' title='Show/Hide attributes'><svg class='icon xr-icon-file-text2'><use xlink:href='#icon-file-text2'></use></svg></label><input id='data-7c7ddc86-4333-4e2b-8fea-e7928ba9f067' class='xr-var-data-in' type='checkbox'><label for='data-7c7ddc86-4333-4e2b-8fea-e7928ba9f067' title='Show/Hide data repr'><svg class='icon xr-icon-database'><use xlink:href='#icon-database'></use></svg></label><div class='xr-var-attrs'><dl class='xr-attrs'><dt><span>standard_name :</span></dt><dd>projection_x_coordinate</dd></dl></div><div class='xr-var-data'><pre>[1 values with dtype=float64]</pre></div></li><li class='xr-var-item'><div class='xr-var-name'><span>mesh2d_face_y</span></div><div class='xr-var-dims'>(mesh2d_nFaces)</div><div class='xr-var-dtype'>float64</div><div class='xr-var-preview xr-preview'>...</div><input id='attrs-07d14423-feca-4ebf-a136-cbf640bab283' class='xr-var-attrs-in' type='checkbox' ><label for='attrs-07d14423-feca-4ebf-a136-cbf640bab283' title='Show/Hide attributes'><svg class='icon xr-icon-file-text2'><use xlink:href='#icon-file-text2'></use></svg></label><input id='data-78cd64fa-97c5-48fb-90a2-4f62b640bac6' class='xr-var-data-in' type='checkbox'><label for='data-78cd64fa-97c5-48fb-90a2-4f62b640bac6' title='Show/Hide data repr'><svg class='icon xr-icon-database'><use xlink:href='#icon-database'></use></svg></label><div class='xr-var-attrs'><dl class='xr-attrs'><dt><span>standard_name :</span></dt><dd>projection_y_coordinate</dd></dl></div><div class='xr-var-data'><pre>[1 values with dtype=float64]</pre></div></li><li class='xr-var-item'><div class='xr-var-name'><span class='xr-has-index'>mesh2d_nFaces</span></div><div class='xr-var-dims'>(mesh2d_nFaces)</div><div class='xr-var-dtype'>int64</div><div class='xr-var-preview xr-preview'>4221</div><input id='attrs-d20c137c-0670-4680-aaad-a03c308430a6' class='xr-var-attrs-in' type='checkbox' disabled><label for='attrs-d20c137c-0670-4680-aaad-a03c308430a6' title='Show/Hide attributes'><svg class='icon xr-icon-file-text2'><use xlink:href='#icon-file-text2'></use></svg></label><input id='data-940246eb-c50c-434a-9983-023dc5f881d7' class='xr-var-data-in' type='checkbox'><label for='data-940246eb-c50c-434a-9983-023dc5f881d7' title='Show/Hide data repr'><svg class='icon xr-icon-database'><use xlink:href='#icon-database'></use></svg></label><div class='xr-var-attrs'><dl class='xr-attrs'></dl></div><div class='xr-var-data'><pre>array([4221])</pre></div></li><li class='xr-var-item'><div class='xr-var-name'><span>mesh2d_index</span></div><div class='xr-var-dims'>(mesh2d_nFaces)</div><div class='xr-var-dtype'>int64</div><div class='xr-var-preview xr-preview'>0</div><input id='attrs-334bb86d-ebb6-4e5d-9ed2-c238ff32b740' class='xr-var-attrs-in' type='checkbox' disabled><label for='attrs-334bb86d-ebb6-4e5d-9ed2-c238ff32b740' title='Show/Hide attributes'><svg class='icon xr-icon-file-text2'><use xlink:href='#icon-file-text2'></use></svg></label><input id='data-ad385048-f379-41f0-aa0d-2b18a8c5c2b3' class='xr-var-data-in' type='checkbox'><label for='data-ad385048-f379-41f0-aa0d-2b18a8c5c2b3' title='Show/Hide data repr'><svg class='icon xr-icon-database'><use xlink:href='#icon-database'></use></svg></label><div class='xr-var-attrs'><dl class='xr-attrs'></dl></div><div class='xr-var-data'><pre>array([0])</pre></div></li><li class='xr-var-item'><div class='xr-var-name'><span>mesh2d_x</span></div><div class='xr-var-dims'>(mesh2d_nFaces)</div><div class='xr-var-dtype'>float64</div><div class='xr-var-preview xr-preview'>1.5e+05</div><input id='attrs-416b11c9-7bc5-4323-90e1-a02f9edcb374' class='xr-var-attrs-in' type='checkbox' disabled><label for='attrs-416b11c9-7bc5-4323-90e1-a02f9edcb374' title='Show/Hide attributes'><svg class='icon xr-icon-file-text2'><use xlink:href='#icon-file-text2'></use></svg></label><input id='data-9891aca1-9350-4e44-a145-5666121b6ff3' class='xr-var-data-in' type='checkbox'><label for='data-9891aca1-9350-4e44-a145-5666121b6ff3' title='Show/Hide data repr'><svg class='icon xr-icon-database'><use xlink:href='#icon-database'></use></svg></label><div class='xr-var-attrs'><dl class='xr-attrs'></dl></div><div class='xr-var-data'><pre>array([150000.])</pre></div></li><li class='xr-var-item'><div class='xr-var-name'><span>mesh2d_y</span></div><div class='xr-var-dims'>(mesh2d_nFaces)</div><div class='xr-var-dtype'>float64</div><div class='xr-var-preview xr-preview'>4.63e+05</div><input id='attrs-7bcd477c-f023-48c5-ab0c-a56c05380e30' class='xr-var-attrs-in' type='checkbox' disabled><label for='attrs-7bcd477c-f023-48c5-ab0c-a56c05380e30' title='Show/Hide attributes'><svg class='icon xr-icon-file-text2'><use xlink:href='#icon-file-text2'></use></svg></label><input id='data-9976c161-c3ed-402c-85ce-2c24c62c16fb' class='xr-var-data-in' type='checkbox'><label for='data-9976c161-c3ed-402c-85ce-2c24c62c16fb' title='Show/Hide data repr'><svg class='icon xr-icon-database'><use xlink:href='#icon-database'></use></svg></label><div class='xr-var-attrs'><dl class='xr-attrs'></dl></div><div class='xr-var-data'><pre>array([463000.])</pre></div></li></ul></div></li><li class='xr-section-item'><input id='section-62dda836-cb3e-4481-903a-fbf73058066c' class='xr-section-summary-in' type='checkbox' ><label for='section-62dda836-cb3e-4481-903a-fbf73058066c' class='xr-section-summary' >Indexes: <span>(1)</span></label><div class='xr-section-inline-details'></div><div class='xr-section-details'><ul class='xr-var-list'><li class='xr-var-item'><div class='xr-index-name'><div>mesh2d_nFaces</div></div><div class='xr-index-preview'>PandasIndex</div><input type='checkbox' disabled/><label></label><input id='index-26653478-2a71-42ba-9e24-ed8c0ebe3862' class='xr-index-data-in' type='checkbox'/><label for='index-26653478-2a71-42ba-9e24-ed8c0ebe3862' title='Show/Hide index repr'><svg class='icon xr-icon-database'><use xlink:href='#icon-database'></use></svg></label><div class='xr-index-data'><pre>PandasIndex(Index([4221], dtype='int64', name='mesh2d_nFaces'))</pre></div></li></ul></div></li><li class='xr-section-item'><input id='section-9278a439-e3d9-4ed3-a309-fe5974354c74' class='xr-section-summary-in' type='checkbox' checked><label for='section-9278a439-e3d9-4ed3-a309-fe5974354c74' class='xr-section-summary' >Attributes: <span>(1)</span></label><div class='xr-section-inline-details'></div><div class='xr-section-details'><dl class='xr-attrs'><dt><span>unit :</span></dt><dd>m NAP</dd></dl></div></li></ul></div></div>
</div>
<br />
<br />
.. GENERATED FROM PYTHON SOURCE LINES 111-114
Multiple values are broadcasted against each other ("outer indexing").
If we select by three x values and two y values, the result is a collection
of six points:
.. GENERATED FROM PYTHON SOURCE LINES 114-119
.. code-block:: Python
da = uda.ugrid.sel(x=[125_000.0, 150_000.0, 175_000.0], y=[400_000.0, 465_000.0])
show_point_selection(uda, da)
da
.. image-sg:: /examples/images/sphx_glr_selection_007.png
:alt: selection
:srcset: /examples/images/sphx_glr_selection_007.png
:class: sphx-glr-single-img
.. raw:: html
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</style><pre class='xr-text-repr-fallback'><xarray.DataArray 'elevation' (mesh2d_nFaces: 6)> Size: 24B
[6 values with dtype=float32]
Coordinates:
mesh2d_face_x (mesh2d_nFaces) float64 48B ...
mesh2d_face_y (mesh2d_nFaces) float64 48B ...
* mesh2d_nFaces (mesh2d_nFaces) int64 48B 1905 1356 372 3057 4198 4113
mesh2d_index (mesh2d_nFaces) int64 48B 0 1 2 3 4 5
mesh2d_x (mesh2d_nFaces) float64 48B 1.25e+05 1.5e+05 ... 1.75e+05
mesh2d_y (mesh2d_nFaces) float64 48B 4e+05 4e+05 ... 4.65e+05 4.65e+05
Attributes:
unit: m NAP</pre><div class='xr-wrap' style='display:none'><div class='xr-header'><div class='xr-obj-type'>xarray.DataArray</div><div class='xr-array-name'>'elevation'</div><ul class='xr-dim-list'><li><span class='xr-has-index'>mesh2d_nFaces</span>: 6</li></ul></div><ul class='xr-sections'><li class='xr-section-item'><div class='xr-array-wrap'><input id='section-6de431f1-d648-4169-a241-4df3c747d20a' class='xr-array-in' type='checkbox' checked><label for='section-6de431f1-d648-4169-a241-4df3c747d20a' title='Show/hide data repr'><svg class='icon xr-icon-database'><use xlink:href='#icon-database'></use></svg></label><div class='xr-array-preview xr-preview'><span>...</span></div><div class='xr-array-data'><pre>[6 values with dtype=float32]</pre></div></div></li><li class='xr-section-item'><input id='section-b7d000f1-e87c-4721-b4a1-81dbabf38e04' class='xr-section-summary-in' type='checkbox' checked><label for='section-b7d000f1-e87c-4721-b4a1-81dbabf38e04' class='xr-section-summary' >Coordinates: <span>(6)</span></label><div class='xr-section-inline-details'></div><div class='xr-section-details'><ul class='xr-var-list'><li class='xr-var-item'><div class='xr-var-name'><span>mesh2d_face_x</span></div><div class='xr-var-dims'>(mesh2d_nFaces)</div><div class='xr-var-dtype'>float64</div><div class='xr-var-preview xr-preview'>...</div><input id='attrs-6c3a4878-6074-418b-9a0d-b4ad2a042fec' class='xr-var-attrs-in' type='checkbox' ><label for='attrs-6c3a4878-6074-418b-9a0d-b4ad2a042fec' title='Show/Hide attributes'><svg class='icon xr-icon-file-text2'><use xlink:href='#icon-file-text2'></use></svg></label><input id='data-68f15bf2-930a-45a5-83ba-f7132e398ece' class='xr-var-data-in' type='checkbox'><label for='data-68f15bf2-930a-45a5-83ba-f7132e398ece' title='Show/Hide data repr'><svg class='icon xr-icon-database'><use xlink:href='#icon-database'></use></svg></label><div class='xr-var-attrs'><dl class='xr-attrs'><dt><span>standard_name :</span></dt><dd>projection_x_coordinate</dd></dl></div><div class='xr-var-data'><pre>[6 values with dtype=float64]</pre></div></li><li class='xr-var-item'><div class='xr-var-name'><span>mesh2d_face_y</span></div><div class='xr-var-dims'>(mesh2d_nFaces)</div><div class='xr-var-dtype'>float64</div><div class='xr-var-preview xr-preview'>...</div><input id='attrs-1d29a8b1-7fe9-4d3f-98a5-d1614eb7cff7' class='xr-var-attrs-in' type='checkbox' ><label for='attrs-1d29a8b1-7fe9-4d3f-98a5-d1614eb7cff7' title='Show/Hide attributes'><svg class='icon xr-icon-file-text2'><use xlink:href='#icon-file-text2'></use></svg></label><input id='data-0e5a158a-dfeb-478d-8776-46e7fc852e0b' class='xr-var-data-in' type='checkbox'><label for='data-0e5a158a-dfeb-478d-8776-46e7fc852e0b' title='Show/Hide data repr'><svg class='icon xr-icon-database'><use xlink:href='#icon-database'></use></svg></label><div class='xr-var-attrs'><dl class='xr-attrs'><dt><span>standard_name :</span></dt><dd>projection_y_coordinate</dd></dl></div><div class='xr-var-data'><pre>[6 values with dtype=float64]</pre></div></li><li class='xr-var-item'><div class='xr-var-name'><span class='xr-has-index'>mesh2d_nFaces</span></div><div class='xr-var-dims'>(mesh2d_nFaces)</div><div class='xr-var-dtype'>int64</div><div class='xr-var-preview xr-preview'>1905 1356 372 3057 4198 4113</div><input id='attrs-75a032b6-87a9-4ea6-a7bf-53d4a15bd945' class='xr-var-attrs-in' type='checkbox' disabled><label for='attrs-75a032b6-87a9-4ea6-a7bf-53d4a15bd945' title='Show/Hide attributes'><svg class='icon xr-icon-file-text2'><use xlink:href='#icon-file-text2'></use></svg></label><input id='data-6fd83a37-0d4e-416f-9a84-3e60d530caf8' class='xr-var-data-in' type='checkbox'><label for='data-6fd83a37-0d4e-416f-9a84-3e60d530caf8' title='Show/Hide data repr'><svg class='icon xr-icon-database'><use xlink:href='#icon-database'></use></svg></label><div class='xr-var-attrs'><dl class='xr-attrs'></dl></div><div class='xr-var-data'><pre>array([1905, 1356, 372, 3057, 4198, 4113])</pre></div></li><li class='xr-var-item'><div class='xr-var-name'><span>mesh2d_index</span></div><div class='xr-var-dims'>(mesh2d_nFaces)</div><div class='xr-var-dtype'>int64</div><div class='xr-var-preview xr-preview'>0 1 2 3 4 5</div><input id='attrs-b2c88fb0-a435-4aec-8244-272932ae8e9d' class='xr-var-attrs-in' type='checkbox' disabled><label for='attrs-b2c88fb0-a435-4aec-8244-272932ae8e9d' title='Show/Hide attributes'><svg class='icon xr-icon-file-text2'><use xlink:href='#icon-file-text2'></use></svg></label><input id='data-a3e6bf15-449e-4cb0-81f2-1345e7efde82' class='xr-var-data-in' type='checkbox'><label for='data-a3e6bf15-449e-4cb0-81f2-1345e7efde82' title='Show/Hide data repr'><svg class='icon xr-icon-database'><use xlink:href='#icon-database'></use></svg></label><div class='xr-var-attrs'><dl class='xr-attrs'></dl></div><div class='xr-var-data'><pre>array([0, 1, 2, 3, 4, 5])</pre></div></li><li class='xr-var-item'><div class='xr-var-name'><span>mesh2d_x</span></div><div class='xr-var-dims'>(mesh2d_nFaces)</div><div class='xr-var-dtype'>float64</div><div class='xr-var-preview xr-preview'>1.25e+05 1.5e+05 ... 1.75e+05</div><input id='attrs-33018611-ab45-45b3-b58e-e893f8c6c4bc' class='xr-var-attrs-in' type='checkbox' disabled><label for='attrs-33018611-ab45-45b3-b58e-e893f8c6c4bc' title='Show/Hide attributes'><svg class='icon xr-icon-file-text2'><use xlink:href='#icon-file-text2'></use></svg></label><input id='data-c5ca1328-0e85-4def-9268-21a3d6efabf8' class='xr-var-data-in' type='checkbox'><label for='data-c5ca1328-0e85-4def-9268-21a3d6efabf8' title='Show/Hide data repr'><svg class='icon xr-icon-database'><use xlink:href='#icon-database'></use></svg></label><div class='xr-var-attrs'><dl class='xr-attrs'></dl></div><div class='xr-var-data'><pre>array([125000., 150000., 175000., 125000., 150000., 175000.])</pre></div></li><li class='xr-var-item'><div class='xr-var-name'><span>mesh2d_y</span></div><div class='xr-var-dims'>(mesh2d_nFaces)</div><div class='xr-var-dtype'>float64</div><div class='xr-var-preview xr-preview'>4e+05 4e+05 ... 4.65e+05 4.65e+05</div><input id='attrs-c05bc662-f89a-4776-aba0-649244ce1259' class='xr-var-attrs-in' type='checkbox' disabled><label for='attrs-c05bc662-f89a-4776-aba0-649244ce1259' title='Show/Hide attributes'><svg class='icon xr-icon-file-text2'><use xlink:href='#icon-file-text2'></use></svg></label><input id='data-162cc38a-44d9-4e00-b111-e74b5a21801a' class='xr-var-data-in' type='checkbox'><label for='data-162cc38a-44d9-4e00-b111-e74b5a21801a' title='Show/Hide data repr'><svg class='icon xr-icon-database'><use xlink:href='#icon-database'></use></svg></label><div class='xr-var-attrs'><dl class='xr-attrs'></dl></div><div class='xr-var-data'><pre>array([400000., 400000., 400000., 465000., 465000., 465000.])</pre></div></li></ul></div></li><li class='xr-section-item'><input id='section-490ed9f4-9456-4996-a4a8-2561409d6af5' class='xr-section-summary-in' type='checkbox' ><label for='section-490ed9f4-9456-4996-a4a8-2561409d6af5' class='xr-section-summary' >Indexes: <span>(1)</span></label><div class='xr-section-inline-details'></div><div class='xr-section-details'><ul class='xr-var-list'><li class='xr-var-item'><div class='xr-index-name'><div>mesh2d_nFaces</div></div><div class='xr-index-preview'>PandasIndex</div><input type='checkbox' disabled/><label></label><input id='index-c8602d3b-99d8-468a-943d-27df947b096f' class='xr-index-data-in' type='checkbox'/><label for='index-c8602d3b-99d8-468a-943d-27df947b096f' title='Show/Hide index repr'><svg class='icon xr-icon-database'><use xlink:href='#icon-database'></use></svg></label><div class='xr-index-data'><pre>PandasIndex(Index([1905, 1356, 372, 3057, 4198, 4113], dtype='int64', name='mesh2d_nFaces'))</pre></div></li></ul></div></li><li class='xr-section-item'><input id='section-7cdd333e-a803-49cf-a65d-728d4f7b327c' class='xr-section-summary-in' type='checkbox' checked><label for='section-7cdd333e-a803-49cf-a65d-728d4f7b327c' class='xr-section-summary' >Attributes: <span>(1)</span></label><div class='xr-section-inline-details'></div><div class='xr-section-details'><dl class='xr-attrs'><dt><span>unit :</span></dt><dd>m NAP</dd></dl></div></li></ul></div></div>
</div>
<br />
<br />
.. GENERATED FROM PYTHON SOURCE LINES 120-121
To select points without broadcasting, use ``.ugrid.sel_points`` instead:
.. GENERATED FROM PYTHON SOURCE LINES 121-128
.. code-block:: Python
da = uda.ugrid.sel_points(
x=[125_000.0, 150_000.0, 175_000.0], y=[400_000.0, 430_000.0, 465_000.0]
)
show_point_selection(uda, da)
da
.. image-sg:: /examples/images/sphx_glr_selection_008.png
:alt: selection
:srcset: /examples/images/sphx_glr_selection_008.png
:class: sphx-glr-single-img
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.xr-index-data-in:checked + label > .xr-icon-database {
color: var(--xr-font-color0);
filter: drop-shadow(1px 1px 5px var(--xr-font-color2));
stroke-width: 0.8px;
}
</style><pre class='xr-text-repr-fallback'><xarray.DataArray 'elevation' (mesh2d_nFaces: 3)> Size: 12B
[3 values with dtype=float32]
Coordinates:
mesh2d_face_x (mesh2d_nFaces) float64 24B ...
mesh2d_face_y (mesh2d_nFaces) float64 24B ...
* mesh2d_nFaces (mesh2d_nFaces) int64 24B 1905 2675 4113
mesh2d_index (mesh2d_nFaces) int64 24B 0 1 2
mesh2d_x (mesh2d_nFaces) float64 24B 1.25e+05 1.5e+05 1.75e+05
mesh2d_y (mesh2d_nFaces) float64 24B 4e+05 4.3e+05 4.65e+05
Attributes:
unit: m NAP</pre><div class='xr-wrap' style='display:none'><div class='xr-header'><div class='xr-obj-type'>xarray.DataArray</div><div class='xr-array-name'>'elevation'</div><ul class='xr-dim-list'><li><span class='xr-has-index'>mesh2d_nFaces</span>: 3</li></ul></div><ul class='xr-sections'><li class='xr-section-item'><div class='xr-array-wrap'><input id='section-9867ed4e-c24d-4cb9-b22d-a901e65de66f' class='xr-array-in' type='checkbox' checked><label for='section-9867ed4e-c24d-4cb9-b22d-a901e65de66f' title='Show/hide data repr'><svg class='icon xr-icon-database'><use xlink:href='#icon-database'></use></svg></label><div class='xr-array-preview xr-preview'><span>...</span></div><div class='xr-array-data'><pre>[3 values with dtype=float32]</pre></div></div></li><li class='xr-section-item'><input id='section-385a9d9f-bf7b-42ce-8edd-6704e13891c7' class='xr-section-summary-in' type='checkbox' checked><label for='section-385a9d9f-bf7b-42ce-8edd-6704e13891c7' class='xr-section-summary' >Coordinates: <span>(6)</span></label><div class='xr-section-inline-details'></div><div class='xr-section-details'><ul class='xr-var-list'><li class='xr-var-item'><div class='xr-var-name'><span>mesh2d_face_x</span></div><div class='xr-var-dims'>(mesh2d_nFaces)</div><div class='xr-var-dtype'>float64</div><div class='xr-var-preview xr-preview'>...</div><input id='attrs-daa5cc1e-9ca7-4b1c-8606-6c90b70fbb1a' class='xr-var-attrs-in' type='checkbox' ><label for='attrs-daa5cc1e-9ca7-4b1c-8606-6c90b70fbb1a' title='Show/Hide attributes'><svg class='icon xr-icon-file-text2'><use xlink:href='#icon-file-text2'></use></svg></label><input id='data-f9a0f98a-a178-48f0-a6c2-b5eb4705336f' class='xr-var-data-in' type='checkbox'><label for='data-f9a0f98a-a178-48f0-a6c2-b5eb4705336f' title='Show/Hide data repr'><svg class='icon xr-icon-database'><use xlink:href='#icon-database'></use></svg></label><div class='xr-var-attrs'><dl class='xr-attrs'><dt><span>standard_name :</span></dt><dd>projection_x_coordinate</dd></dl></div><div class='xr-var-data'><pre>[3 values with dtype=float64]</pre></div></li><li class='xr-var-item'><div class='xr-var-name'><span>mesh2d_face_y</span></div><div class='xr-var-dims'>(mesh2d_nFaces)</div><div class='xr-var-dtype'>float64</div><div class='xr-var-preview xr-preview'>...</div><input id='attrs-d1e3a446-5f86-4176-9cb2-37f0774f36a8' class='xr-var-attrs-in' type='checkbox' ><label for='attrs-d1e3a446-5f86-4176-9cb2-37f0774f36a8' title='Show/Hide attributes'><svg class='icon xr-icon-file-text2'><use xlink:href='#icon-file-text2'></use></svg></label><input id='data-e74563de-011d-446e-bfa9-b1e4d2988b53' class='xr-var-data-in' type='checkbox'><label for='data-e74563de-011d-446e-bfa9-b1e4d2988b53' title='Show/Hide data repr'><svg class='icon xr-icon-database'><use xlink:href='#icon-database'></use></svg></label><div class='xr-var-attrs'><dl class='xr-attrs'><dt><span>standard_name :</span></dt><dd>projection_y_coordinate</dd></dl></div><div class='xr-var-data'><pre>[3 values with dtype=float64]</pre></div></li><li class='xr-var-item'><div class='xr-var-name'><span class='xr-has-index'>mesh2d_nFaces</span></div><div class='xr-var-dims'>(mesh2d_nFaces)</div><div class='xr-var-dtype'>int64</div><div class='xr-var-preview xr-preview'>1905 2675 4113</div><input id='attrs-a575f8ae-f8ad-4c8c-a887-627184a08119' class='xr-var-attrs-in' type='checkbox' disabled><label for='attrs-a575f8ae-f8ad-4c8c-a887-627184a08119' title='Show/Hide attributes'><svg class='icon xr-icon-file-text2'><use xlink:href='#icon-file-text2'></use></svg></label><input id='data-70a70e44-8eaf-4beb-8349-b4be4b54f3f8' class='xr-var-data-in' type='checkbox'><label for='data-70a70e44-8eaf-4beb-8349-b4be4b54f3f8' title='Show/Hide data repr'><svg class='icon xr-icon-database'><use xlink:href='#icon-database'></use></svg></label><div class='xr-var-attrs'><dl class='xr-attrs'></dl></div><div class='xr-var-data'><pre>array([1905, 2675, 4113])</pre></div></li><li class='xr-var-item'><div class='xr-var-name'><span>mesh2d_index</span></div><div class='xr-var-dims'>(mesh2d_nFaces)</div><div class='xr-var-dtype'>int64</div><div class='xr-var-preview xr-preview'>0 1 2</div><input id='attrs-6c2d691e-c944-4389-b2db-f9fb2c59d222' class='xr-var-attrs-in' type='checkbox' disabled><label for='attrs-6c2d691e-c944-4389-b2db-f9fb2c59d222' title='Show/Hide attributes'><svg class='icon xr-icon-file-text2'><use xlink:href='#icon-file-text2'></use></svg></label><input id='data-31974f75-1033-4f11-9ca7-8f1e5f32f3ed' class='xr-var-data-in' type='checkbox'><label for='data-31974f75-1033-4f11-9ca7-8f1e5f32f3ed' title='Show/Hide data repr'><svg class='icon xr-icon-database'><use xlink:href='#icon-database'></use></svg></label><div class='xr-var-attrs'><dl class='xr-attrs'></dl></div><div class='xr-var-data'><pre>array([0, 1, 2])</pre></div></li><li class='xr-var-item'><div class='xr-var-name'><span>mesh2d_x</span></div><div class='xr-var-dims'>(mesh2d_nFaces)</div><div class='xr-var-dtype'>float64</div><div class='xr-var-preview xr-preview'>1.25e+05 1.5e+05 1.75e+05</div><input id='attrs-27ed100d-98ec-4ae4-b656-7c7d65fafde3' class='xr-var-attrs-in' type='checkbox' disabled><label for='attrs-27ed100d-98ec-4ae4-b656-7c7d65fafde3' title='Show/Hide attributes'><svg class='icon xr-icon-file-text2'><use xlink:href='#icon-file-text2'></use></svg></label><input id='data-28de27df-1ae1-44c4-8766-5cb316812af2' class='xr-var-data-in' type='checkbox'><label for='data-28de27df-1ae1-44c4-8766-5cb316812af2' title='Show/Hide data repr'><svg class='icon xr-icon-database'><use xlink:href='#icon-database'></use></svg></label><div class='xr-var-attrs'><dl class='xr-attrs'></dl></div><div class='xr-var-data'><pre>array([125000., 150000., 175000.])</pre></div></li><li class='xr-var-item'><div class='xr-var-name'><span>mesh2d_y</span></div><div class='xr-var-dims'>(mesh2d_nFaces)</div><div class='xr-var-dtype'>float64</div><div class='xr-var-preview xr-preview'>4e+05 4.3e+05 4.65e+05</div><input id='attrs-93ee8692-0620-4a8a-b600-d5d2b6662e74' class='xr-var-attrs-in' type='checkbox' disabled><label for='attrs-93ee8692-0620-4a8a-b600-d5d2b6662e74' title='Show/Hide attributes'><svg class='icon xr-icon-file-text2'><use xlink:href='#icon-file-text2'></use></svg></label><input id='data-64ba682a-5fe5-4963-b3b4-177d9f7d22f1' class='xr-var-data-in' type='checkbox'><label for='data-64ba682a-5fe5-4963-b3b4-177d9f7d22f1' title='Show/Hide data repr'><svg class='icon xr-icon-database'><use xlink:href='#icon-database'></use></svg></label><div class='xr-var-attrs'><dl class='xr-attrs'></dl></div><div class='xr-var-data'><pre>array([400000., 430000., 465000.])</pre></div></li></ul></div></li><li class='xr-section-item'><input id='section-eded895d-620d-4b20-8439-cd74dbc86b0b' class='xr-section-summary-in' type='checkbox' ><label for='section-eded895d-620d-4b20-8439-cd74dbc86b0b' class='xr-section-summary' >Indexes: <span>(1)</span></label><div class='xr-section-inline-details'></div><div class='xr-section-details'><ul class='xr-var-list'><li class='xr-var-item'><div class='xr-index-name'><div>mesh2d_nFaces</div></div><div class='xr-index-preview'>PandasIndex</div><input type='checkbox' disabled/><label></label><input id='index-6abe1e0c-e755-4d3a-a385-00e3181def94' class='xr-index-data-in' type='checkbox'/><label for='index-6abe1e0c-e755-4d3a-a385-00e3181def94' title='Show/Hide index repr'><svg class='icon xr-icon-database'><use xlink:href='#icon-database'></use></svg></label><div class='xr-index-data'><pre>PandasIndex(Index([1905, 2675, 4113], dtype='int64', name='mesh2d_nFaces'))</pre></div></li></ul></div></li><li class='xr-section-item'><input id='section-28f619c2-322f-4a62-bead-256fe48720bc' class='xr-section-summary-in' type='checkbox' checked><label for='section-28f619c2-322f-4a62-bead-256fe48720bc' class='xr-section-summary' >Attributes: <span>(1)</span></label><div class='xr-section-inline-details'></div><div class='xr-section-details'><dl class='xr-attrs'><dt><span>unit :</span></dt><dd>m NAP</dd></dl></div></li></ul></div></div>
</div>
<br />
<br />
.. GENERATED FROM PYTHON SOURCE LINES 129-130
We can sample points along a line as well by providing slices **with** a step:
.. GENERATED FROM PYTHON SOURCE LINES 130-135
.. code-block:: Python
da = uda.ugrid.sel(x=slice(100_000.0, 200_000.0, 10_000.0), y=465_000.0)
show_point_selection(uda, da)
da
.. image-sg:: /examples/images/sphx_glr_selection_009.png
:alt: selection
:srcset: /examples/images/sphx_glr_selection_009.png
:class: sphx-glr-single-img
.. raw:: html
<div class="output_subarea output_html rendered_html output_result">
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.xr-attrs dt {
font-weight: normal;
grid-column: 1;
}
.xr-attrs dt:hover span {
display: inline-block;
background: var(--xr-background-color);
padding-right: 10px;
}
.xr-attrs dd {
grid-column: 2;
white-space: pre-wrap;
word-break: break-all;
}
.xr-icon-database,
.xr-icon-file-text2,
.xr-no-icon {
display: inline-block;
vertical-align: middle;
width: 1em;
height: 1.5em !important;
stroke-width: 0;
stroke: currentColor;
fill: currentColor;
}
.xr-var-attrs-in:checked + label > .xr-icon-file-text2,
.xr-var-data-in:checked + label > .xr-icon-database,
.xr-index-data-in:checked + label > .xr-icon-database {
color: var(--xr-font-color0);
filter: drop-shadow(1px 1px 5px var(--xr-font-color2));
stroke-width: 0.8px;
}
</style><pre class='xr-text-repr-fallback'><xarray.DataArray 'elevation' (mesh2d_nFaces: 10)> Size: 40B
[10 values with dtype=float32]
Coordinates:
mesh2d_face_x (mesh2d_nFaces) float64 80B ...
mesh2d_face_y (mesh2d_nFaces) float64 80B ...
* mesh2d_nFaces (mesh2d_nFaces) int64 80B 3263 3225 3144 ... 2941 3135 4256
mesh2d_index (mesh2d_nFaces) int64 80B 0 1 2 3 4 5 6 7 8 9
mesh2d_x (mesh2d_nFaces) float64 80B 1e+05 1.1e+05 ... 1.8e+05 1.9e+05
mesh2d_y (mesh2d_nFaces) float64 80B 4.65e+05 4.65e+05 ... 4.65e+05
Attributes:
unit: m NAP</pre><div class='xr-wrap' style='display:none'><div class='xr-header'><div class='xr-obj-type'>xarray.DataArray</div><div class='xr-array-name'>'elevation'</div><ul class='xr-dim-list'><li><span class='xr-has-index'>mesh2d_nFaces</span>: 10</li></ul></div><ul class='xr-sections'><li class='xr-section-item'><div class='xr-array-wrap'><input id='section-01a7ad20-d4a5-44ca-bffc-ae4f4d453a20' class='xr-array-in' type='checkbox' checked><label for='section-01a7ad20-d4a5-44ca-bffc-ae4f4d453a20' title='Show/hide data repr'><svg class='icon xr-icon-database'><use xlink:href='#icon-database'></use></svg></label><div class='xr-array-preview xr-preview'><span>...</span></div><div class='xr-array-data'><pre>[10 values with dtype=float32]</pre></div></div></li><li class='xr-section-item'><input id='section-af0f7285-e99d-4d56-aded-d89515494200' class='xr-section-summary-in' type='checkbox' checked><label for='section-af0f7285-e99d-4d56-aded-d89515494200' class='xr-section-summary' >Coordinates: <span>(6)</span></label><div class='xr-section-inline-details'></div><div class='xr-section-details'><ul class='xr-var-list'><li class='xr-var-item'><div class='xr-var-name'><span>mesh2d_face_x</span></div><div class='xr-var-dims'>(mesh2d_nFaces)</div><div class='xr-var-dtype'>float64</div><div class='xr-var-preview xr-preview'>...</div><input id='attrs-ff58dce7-d4f1-45d1-aae7-7b5633cfd32e' class='xr-var-attrs-in' type='checkbox' ><label for='attrs-ff58dce7-d4f1-45d1-aae7-7b5633cfd32e' title='Show/Hide attributes'><svg class='icon xr-icon-file-text2'><use xlink:href='#icon-file-text2'></use></svg></label><input id='data-e47fa7aa-7eb0-40d7-b1cf-af9fbf066a7a' class='xr-var-data-in' type='checkbox'><label for='data-e47fa7aa-7eb0-40d7-b1cf-af9fbf066a7a' title='Show/Hide data repr'><svg class='icon xr-icon-database'><use xlink:href='#icon-database'></use></svg></label><div class='xr-var-attrs'><dl class='xr-attrs'><dt><span>standard_name :</span></dt><dd>projection_x_coordinate</dd></dl></div><div class='xr-var-data'><pre>[10 values with dtype=float64]</pre></div></li><li class='xr-var-item'><div class='xr-var-name'><span>mesh2d_face_y</span></div><div class='xr-var-dims'>(mesh2d_nFaces)</div><div class='xr-var-dtype'>float64</div><div class='xr-var-preview xr-preview'>...</div><input id='attrs-027b7e72-d33c-4c62-81d7-afa722a13171' class='xr-var-attrs-in' type='checkbox' ><label for='attrs-027b7e72-d33c-4c62-81d7-afa722a13171' title='Show/Hide attributes'><svg class='icon xr-icon-file-text2'><use xlink:href='#icon-file-text2'></use></svg></label><input id='data-211e006b-af05-48a1-b5a3-b5359b7f78a1' class='xr-var-data-in' type='checkbox'><label for='data-211e006b-af05-48a1-b5a3-b5359b7f78a1' title='Show/Hide data repr'><svg class='icon xr-icon-database'><use xlink:href='#icon-database'></use></svg></label><div class='xr-var-attrs'><dl class='xr-attrs'><dt><span>standard_name :</span></dt><dd>projection_y_coordinate</dd></dl></div><div class='xr-var-data'><pre>[10 values with dtype=float64]</pre></div></li><li class='xr-var-item'><div class='xr-var-name'><span class='xr-has-index'>mesh2d_nFaces</span></div><div class='xr-var-dims'>(mesh2d_nFaces)</div><div class='xr-var-dtype'>int64</div><div class='xr-var-preview xr-preview'>3263 3225 3144 ... 2941 3135 4256</div><input id='attrs-96f47135-29b3-4836-99aa-a35aa706fef4' class='xr-var-attrs-in' type='checkbox' disabled><label for='attrs-96f47135-29b3-4836-99aa-a35aa706fef4' title='Show/Hide attributes'><svg class='icon xr-icon-file-text2'><use xlink:href='#icon-file-text2'></use></svg></label><input id='data-2fdf021b-f28d-45d2-999c-8fe6ab52d123' class='xr-var-data-in' type='checkbox'><label for='data-2fdf021b-f28d-45d2-999c-8fe6ab52d123' title='Show/Hide data repr'><svg class='icon xr-icon-database'><use xlink:href='#icon-database'></use></svg></label><div class='xr-var-attrs'><dl class='xr-attrs'></dl></div><div class='xr-var-data'><pre>array([3263, 3225, 3144, 2854, 3012, 4198, 4197, 2941, 3135, 4256])</pre></div></li><li class='xr-var-item'><div class='xr-var-name'><span>mesh2d_index</span></div><div class='xr-var-dims'>(mesh2d_nFaces)</div><div class='xr-var-dtype'>int64</div><div class='xr-var-preview xr-preview'>0 1 2 3 4 5 6 7 8 9</div><input id='attrs-b7a0df30-ddd8-4c68-b16a-f014d5f97012' class='xr-var-attrs-in' type='checkbox' disabled><label for='attrs-b7a0df30-ddd8-4c68-b16a-f014d5f97012' title='Show/Hide attributes'><svg class='icon xr-icon-file-text2'><use xlink:href='#icon-file-text2'></use></svg></label><input id='data-b016f823-2fda-4397-82cd-bd577b3ad8e3' class='xr-var-data-in' type='checkbox'><label for='data-b016f823-2fda-4397-82cd-bd577b3ad8e3' title='Show/Hide data repr'><svg class='icon xr-icon-database'><use xlink:href='#icon-database'></use></svg></label><div class='xr-var-attrs'><dl class='xr-attrs'></dl></div><div class='xr-var-data'><pre>array([0, 1, 2, 3, 4, 5, 6, 7, 8, 9])</pre></div></li><li class='xr-var-item'><div class='xr-var-name'><span>mesh2d_x</span></div><div class='xr-var-dims'>(mesh2d_nFaces)</div><div class='xr-var-dtype'>float64</div><div class='xr-var-preview xr-preview'>1e+05 1.1e+05 ... 1.8e+05 1.9e+05</div><input id='attrs-4a35691b-1f5d-407a-a7aa-27f445396ed5' class='xr-var-attrs-in' type='checkbox' disabled><label for='attrs-4a35691b-1f5d-407a-a7aa-27f445396ed5' title='Show/Hide attributes'><svg class='icon xr-icon-file-text2'><use xlink:href='#icon-file-text2'></use></svg></label><input id='data-ed8a2fe5-ae95-40bb-beee-ae5c2a8f32e7' class='xr-var-data-in' type='checkbox'><label for='data-ed8a2fe5-ae95-40bb-beee-ae5c2a8f32e7' title='Show/Hide data repr'><svg class='icon xr-icon-database'><use xlink:href='#icon-database'></use></svg></label><div class='xr-var-attrs'><dl class='xr-attrs'></dl></div><div class='xr-var-data'><pre>array([100000., 110000., 120000., 130000., 140000., 150000., 160000.,
170000., 180000., 190000.])</pre></div></li><li class='xr-var-item'><div class='xr-var-name'><span>mesh2d_y</span></div><div class='xr-var-dims'>(mesh2d_nFaces)</div><div class='xr-var-dtype'>float64</div><div class='xr-var-preview xr-preview'>4.65e+05 4.65e+05 ... 4.65e+05</div><input id='attrs-cb93f0e4-3528-403a-a784-35e20989cd30' class='xr-var-attrs-in' type='checkbox' disabled><label for='attrs-cb93f0e4-3528-403a-a784-35e20989cd30' title='Show/Hide attributes'><svg class='icon xr-icon-file-text2'><use xlink:href='#icon-file-text2'></use></svg></label><input id='data-60710e2b-e331-40a5-949f-3f15587cd076' class='xr-var-data-in' type='checkbox'><label for='data-60710e2b-e331-40a5-949f-3f15587cd076' title='Show/Hide data repr'><svg class='icon xr-icon-database'><use xlink:href='#icon-database'></use></svg></label><div class='xr-var-attrs'><dl class='xr-attrs'></dl></div><div class='xr-var-data'><pre>array([465000., 465000., 465000., 465000., 465000., 465000., 465000.,
465000., 465000., 465000.])</pre></div></li></ul></div></li><li class='xr-section-item'><input id='section-6414a6bd-7570-4387-81c5-77b9e796d24d' class='xr-section-summary-in' type='checkbox' ><label for='section-6414a6bd-7570-4387-81c5-77b9e796d24d' class='xr-section-summary' >Indexes: <span>(1)</span></label><div class='xr-section-inline-details'></div><div class='xr-section-details'><ul class='xr-var-list'><li class='xr-var-item'><div class='xr-index-name'><div>mesh2d_nFaces</div></div><div class='xr-index-preview'>PandasIndex</div><input type='checkbox' disabled/><label></label><input id='index-46713222-2555-4e6f-8e21-d3ee0e9e18c8' class='xr-index-data-in' type='checkbox'/><label for='index-46713222-2555-4e6f-8e21-d3ee0e9e18c8' title='Show/Hide index repr'><svg class='icon xr-icon-database'><use xlink:href='#icon-database'></use></svg></label><div class='xr-index-data'><pre>PandasIndex(Index([3263, 3225, 3144, 2854, 3012, 4198, 4197, 2941, 3135, 4256], dtype='int64', name='mesh2d_nFaces'))</pre></div></li></ul></div></li><li class='xr-section-item'><input id='section-58c8dee9-4e44-46a1-81fa-a27cc4558113' class='xr-section-summary-in' type='checkbox' checked><label for='section-58c8dee9-4e44-46a1-81fa-a27cc4558113' class='xr-section-summary' >Attributes: <span>(1)</span></label><div class='xr-section-inline-details'></div><div class='xr-section-details'><dl class='xr-attrs'><dt><span>unit :</span></dt><dd>m NAP</dd></dl></div></li></ul></div></div>
</div>
<br />
<br />
.. GENERATED FROM PYTHON SOURCE LINES 136-137
Two slices with a step results in broadcasting:
.. GENERATED FROM PYTHON SOURCE LINES 137-144
.. code-block:: Python
da = uda.ugrid.sel(
x=slice(100_000.0, 200_000.0, 10_000.0), y=slice(400_000.0, 500_000.0, 10_000.0)
)
show_point_selection(uda, da)
da
.. image-sg:: /examples/images/sphx_glr_selection_010.png
:alt: selection
:srcset: /examples/images/sphx_glr_selection_010.png
:class: sphx-glr-single-img
.. raw:: html
<div class="output_subarea output_html rendered_html output_result">
<div><svg style="position: absolute; width: 0; height: 0; overflow: hidden">
<defs>
<symbol id="icon-database" viewBox="0 0 32 32">
<path d="M16 0c-8.837 0-16 2.239-16 5v4c0 2.761 7.163 5 16 5s16-2.239 16-5v-4c0-2.761-7.163-5-16-5z"></path>
<path d="M16 17c-8.837 0-16-2.239-16-5v6c0 2.761 7.163 5 16 5s16-2.239 16-5v-6c0 2.761-7.163 5-16 5z"></path>
<path d="M16 26c-8.837 0-16-2.239-16-5v6c0 2.761 7.163 5 16 5s16-2.239 16-5v-6c0 2.761-7.163 5-16 5z"></path>
</symbol>
<symbol id="icon-file-text2" viewBox="0 0 32 32">
<path d="M28.681 7.159c-0.694-0.947-1.662-2.053-2.724-3.116s-2.169-2.030-3.116-2.724c-1.612-1.182-2.393-1.319-2.841-1.319h-15.5c-1.378 0-2.5 1.121-2.5 2.5v27c0 1.378 1.122 2.5 2.5 2.5h23c1.378 0 2.5-1.122 2.5-2.5v-19.5c0-0.448-0.137-1.23-1.319-2.841zM24.543 5.457c0.959 0.959 1.712 1.825 2.268 2.543h-4.811v-4.811c0.718 0.556 1.584 1.309 2.543 2.268zM28 29.5c0 0.271-0.229 0.5-0.5 0.5h-23c-0.271 0-0.5-0.229-0.5-0.5v-27c0-0.271 0.229-0.5 0.5-0.5 0 0 15.499-0 15.5 0v7c0 0.552 0.448 1 1 1h7v19.5z"></path>
<path d="M23 26h-14c-0.552 0-1-0.448-1-1s0.448-1 1-1h14c0.552 0 1 0.448 1 1s-0.448 1-1 1z"></path>
<path d="M23 22h-14c-0.552 0-1-0.448-1-1s0.448-1 1-1h14c0.552 0 1 0.448 1 1s-0.448 1-1 1z"></path>
<path d="M23 18h-14c-0.552 0-1-0.448-1-1s0.448-1 1-1h14c0.552 0 1 0.448 1 1s-0.448 1-1 1z"></path>
</symbol>
</defs>
</svg>
<style>/* CSS stylesheet for displaying xarray objects in jupyterlab.
*
*/
:root {
--xr-font-color0: var(
--jp-content-font-color0,
var(--pst-color-text-base rgba(0, 0, 0, 1))
);
--xr-font-color2: var(
--jp-content-font-color2,
var(--pst-color-text-base, rgba(0, 0, 0, 0.54))
);
--xr-font-color3: var(
--jp-content-font-color3,
var(--pst-color-text-base, rgba(0, 0, 0, 0.38))
);
--xr-border-color: var(
--jp-border-color2,
hsl(from var(--pst-color-on-background, white) h s calc(l - 10))
);
--xr-disabled-color: var(
--jp-layout-color3,
hsl(from var(--pst-color-on-background, white) h s calc(l - 40))
);
--xr-background-color: var(
--jp-layout-color0,
var(--pst-color-on-background, white)
);
--xr-background-color-row-even: var(
--jp-layout-color1,
hsl(from var(--pst-color-on-background, white) h s calc(l - 5))
);
--xr-background-color-row-odd: var(
--jp-layout-color2,
hsl(from var(--pst-color-on-background, white) h s calc(l - 15))
);
}
html[theme="dark"],
html[data-theme="dark"],
body[data-theme="dark"],
body.vscode-dark {
--xr-font-color0: var(
--jp-content-font-color0,
var(--pst-color-text-base, rgba(255, 255, 255, 1))
);
--xr-font-color2: var(
--jp-content-font-color2,
var(--pst-color-text-base, rgba(255, 255, 255, 0.54))
);
--xr-font-color3: var(
--jp-content-font-color3,
var(--pst-color-text-base, rgba(255, 255, 255, 0.38))
);
--xr-border-color: var(
--jp-border-color2,
hsl(from var(--pst-color-on-background, #111111) h s calc(l + 10))
);
--xr-disabled-color: var(
--jp-layout-color3,
hsl(from var(--pst-color-on-background, #111111) h s calc(l + 40))
);
--xr-background-color: var(
--jp-layout-color0,
var(--pst-color-on-background, #111111)
);
--xr-background-color-row-even: var(
--jp-layout-color1,
hsl(from var(--pst-color-on-background, #111111) h s calc(l + 5))
);
--xr-background-color-row-odd: var(
--jp-layout-color2,
hsl(from var(--pst-color-on-background, #111111) h s calc(l + 15))
);
}
.xr-wrap {
display: block !important;
min-width: 300px;
max-width: 700px;
}
.xr-text-repr-fallback {
/* fallback to plain text repr when CSS is not injected (untrusted notebook) */
display: none;
}
.xr-header {
padding-top: 6px;
padding-bottom: 6px;
margin-bottom: 4px;
border-bottom: solid 1px var(--xr-border-color);
}
.xr-header > div,
.xr-header > ul {
display: inline;
margin-top: 0;
margin-bottom: 0;
}
.xr-obj-type,
.xr-array-name {
margin-left: 2px;
margin-right: 10px;
}
.xr-obj-type {
color: var(--xr-font-color2);
}
.xr-sections {
padding-left: 0 !important;
display: grid;
grid-template-columns: 150px auto auto 1fr 0 20px 0 20px;
}
.xr-section-item {
display: contents;
}
.xr-section-item input {
display: inline-block;
opacity: 0;
height: 0;
}
.xr-section-item input + label {
color: var(--xr-disabled-color);
border: 2px solid transparent !important;
}
.xr-section-item input:enabled + label {
cursor: pointer;
color: var(--xr-font-color2);
}
.xr-section-item input:focus + label {
border: 2px solid var(--xr-font-color0) !important;
}
.xr-section-item input:enabled + label:hover {
color: var(--xr-font-color0);
}
.xr-section-summary {
grid-column: 1;
color: var(--xr-font-color2);
font-weight: 500;
}
.xr-section-summary > span {
display: inline-block;
padding-left: 0.5em;
}
.xr-section-summary-in:disabled + label {
color: var(--xr-font-color2);
}
.xr-section-summary-in + label:before {
display: inline-block;
content: "►";
font-size: 11px;
width: 15px;
text-align: center;
}
.xr-section-summary-in:disabled + label:before {
color: var(--xr-disabled-color);
}
.xr-section-summary-in:checked + label:before {
content: "▼";
}
.xr-section-summary-in:checked + label > span {
display: none;
}
.xr-section-summary,
.xr-section-inline-details {
padding-top: 4px;
padding-bottom: 4px;
}
.xr-section-inline-details {
grid-column: 2 / -1;
}
.xr-section-details {
display: none;
grid-column: 1 / -1;
margin-bottom: 5px;
}
.xr-section-summary-in:checked ~ .xr-section-details {
display: contents;
}
.xr-array-wrap {
grid-column: 1 / -1;
display: grid;
grid-template-columns: 20px auto;
}
.xr-array-wrap > label {
grid-column: 1;
vertical-align: top;
}
.xr-preview {
color: var(--xr-font-color3);
}
.xr-array-preview,
.xr-array-data {
padding: 0 5px !important;
grid-column: 2;
}
.xr-array-data,
.xr-array-in:checked ~ .xr-array-preview {
display: none;
}
.xr-array-in:checked ~ .xr-array-data,
.xr-array-preview {
display: inline-block;
}
.xr-dim-list {
display: inline-block !important;
list-style: none;
padding: 0 !important;
margin: 0;
}
.xr-dim-list li {
display: inline-block;
padding: 0;
margin: 0;
}
.xr-dim-list:before {
content: "(";
}
.xr-dim-list:after {
content: ")";
}
.xr-dim-list li:not(:last-child):after {
content: ",";
padding-right: 5px;
}
.xr-has-index {
font-weight: bold;
}
.xr-var-list,
.xr-var-item {
display: contents;
}
.xr-var-item > div,
.xr-var-item label,
.xr-var-item > .xr-var-name span {
background-color: var(--xr-background-color-row-even);
border-color: var(--xr-background-color-row-odd);
margin-bottom: 0;
padding-top: 2px;
}
.xr-var-item > .xr-var-name:hover span {
padding-right: 5px;
}
.xr-var-list > li:nth-child(odd) > div,
.xr-var-list > li:nth-child(odd) > label,
.xr-var-list > li:nth-child(odd) > .xr-var-name span {
background-color: var(--xr-background-color-row-odd);
border-color: var(--xr-background-color-row-even);
}
.xr-var-name {
grid-column: 1;
}
.xr-var-dims {
grid-column: 2;
}
.xr-var-dtype {
grid-column: 3;
text-align: right;
color: var(--xr-font-color2);
}
.xr-var-preview {
grid-column: 4;
}
.xr-index-preview {
grid-column: 2 / 5;
color: var(--xr-font-color2);
}
.xr-var-name,
.xr-var-dims,
.xr-var-dtype,
.xr-preview,
.xr-attrs dt {
white-space: nowrap;
overflow: hidden;
text-overflow: ellipsis;
padding-right: 10px;
}
.xr-var-name:hover,
.xr-var-dims:hover,
.xr-var-dtype:hover,
.xr-attrs dt:hover {
overflow: visible;
width: auto;
z-index: 1;
}
.xr-var-attrs,
.xr-var-data,
.xr-index-data {
display: none;
border-top: 2px dotted var(--xr-background-color);
padding-bottom: 20px !important;
padding-top: 10px !important;
}
.xr-var-attrs-in + label,
.xr-var-data-in + label,
.xr-index-data-in + label {
padding: 0 1px;
}
.xr-var-attrs-in:checked ~ .xr-var-attrs,
.xr-var-data-in:checked ~ .xr-var-data,
.xr-index-data-in:checked ~ .xr-index-data {
display: block;
}
.xr-var-data > table {
float: right;
}
.xr-var-data > pre,
.xr-index-data > pre,
.xr-var-data > table > tbody > tr {
background-color: transparent !important;
}
.xr-var-name span,
.xr-var-data,
.xr-index-name div,
.xr-index-data,
.xr-attrs {
padding-left: 25px !important;
}
.xr-attrs,
.xr-var-attrs,
.xr-var-data,
.xr-index-data {
grid-column: 1 / -1;
}
dl.xr-attrs {
padding: 0;
margin: 0;
display: grid;
grid-template-columns: 125px auto;
}
.xr-attrs dt,
.xr-attrs dd {
padding: 0;
margin: 0;
float: left;
padding-right: 10px;
width: auto;
}
.xr-attrs dt {
font-weight: normal;
grid-column: 1;
}
.xr-attrs dt:hover span {
display: inline-block;
background: var(--xr-background-color);
padding-right: 10px;
}
.xr-attrs dd {
grid-column: 2;
white-space: pre-wrap;
word-break: break-all;
}
.xr-icon-database,
.xr-icon-file-text2,
.xr-no-icon {
display: inline-block;
vertical-align: middle;
width: 1em;
height: 1.5em !important;
stroke-width: 0;
stroke: currentColor;
fill: currentColor;
}
.xr-var-attrs-in:checked + label > .xr-icon-file-text2,
.xr-var-data-in:checked + label > .xr-icon-database,
.xr-index-data-in:checked + label > .xr-icon-database {
color: var(--xr-font-color0);
filter: drop-shadow(1px 1px 5px var(--xr-font-color2));
stroke-width: 0.8px;
}
</style><pre class='xr-text-repr-fallback'><xarray.DataArray 'elevation' (mesh2d_nFaces: 100)> Size: 400B
[100 values with dtype=float32]
Coordinates:
mesh2d_face_x (mesh2d_nFaces) float64 800B ...
mesh2d_face_y (mesh2d_nFaces) float64 800B ...
* mesh2d_nFaces (mesh2d_nFaces) int64 800B 1867 1882 1890 ... 4121 4077 1581
mesh2d_index (mesh2d_nFaces) int64 800B 0 1 2 3 4 5 ... 94 95 96 97 98 99
mesh2d_x (mesh2d_nFaces) float64 800B 1e+05 1.1e+05 ... 1.9e+05
mesh2d_y (mesh2d_nFaces) float64 800B 4e+05 4e+05 ... 4.9e+05 4.9e+05
Attributes:
unit: m NAP</pre><div class='xr-wrap' style='display:none'><div class='xr-header'><div class='xr-obj-type'>xarray.DataArray</div><div class='xr-array-name'>'elevation'</div><ul class='xr-dim-list'><li><span class='xr-has-index'>mesh2d_nFaces</span>: 100</li></ul></div><ul class='xr-sections'><li class='xr-section-item'><div class='xr-array-wrap'><input id='section-96f9291a-4618-43bd-98a7-ac0ab9505b3f' class='xr-array-in' type='checkbox' checked><label for='section-96f9291a-4618-43bd-98a7-ac0ab9505b3f' title='Show/hide data repr'><svg class='icon xr-icon-database'><use xlink:href='#icon-database'></use></svg></label><div class='xr-array-preview xr-preview'><span>...</span></div><div class='xr-array-data'><pre>[100 values with dtype=float32]</pre></div></div></li><li class='xr-section-item'><input id='section-80dc10d8-d182-44a5-b718-1ae7561a97b1' class='xr-section-summary-in' type='checkbox' checked><label for='section-80dc10d8-d182-44a5-b718-1ae7561a97b1' class='xr-section-summary' >Coordinates: <span>(6)</span></label><div class='xr-section-inline-details'></div><div class='xr-section-details'><ul class='xr-var-list'><li class='xr-var-item'><div class='xr-var-name'><span>mesh2d_face_x</span></div><div class='xr-var-dims'>(mesh2d_nFaces)</div><div class='xr-var-dtype'>float64</div><div class='xr-var-preview xr-preview'>...</div><input id='attrs-58fa0381-71d7-4766-bc8c-c6d0b2ee8ad8' class='xr-var-attrs-in' type='checkbox' ><label for='attrs-58fa0381-71d7-4766-bc8c-c6d0b2ee8ad8' title='Show/Hide attributes'><svg class='icon xr-icon-file-text2'><use xlink:href='#icon-file-text2'></use></svg></label><input id='data-8e9a654f-3c75-4200-bb4f-e82a41ec75d1' class='xr-var-data-in' type='checkbox'><label for='data-8e9a654f-3c75-4200-bb4f-e82a41ec75d1' title='Show/Hide data repr'><svg class='icon xr-icon-database'><use xlink:href='#icon-database'></use></svg></label><div class='xr-var-attrs'><dl class='xr-attrs'><dt><span>standard_name :</span></dt><dd>projection_x_coordinate</dd></dl></div><div class='xr-var-data'><pre>[100 values with dtype=float64]</pre></div></li><li class='xr-var-item'><div class='xr-var-name'><span>mesh2d_face_y</span></div><div class='xr-var-dims'>(mesh2d_nFaces)</div><div class='xr-var-dtype'>float64</div><div class='xr-var-preview xr-preview'>...</div><input id='attrs-66dcb377-4c28-45cc-95e8-9abe5ba224ea' class='xr-var-attrs-in' type='checkbox' ><label for='attrs-66dcb377-4c28-45cc-95e8-9abe5ba224ea' title='Show/Hide attributes'><svg class='icon xr-icon-file-text2'><use xlink:href='#icon-file-text2'></use></svg></label><input id='data-3493eb6d-9d7e-4df8-a901-6b54c0a6c7fb' class='xr-var-data-in' type='checkbox'><label for='data-3493eb6d-9d7e-4df8-a901-6b54c0a6c7fb' title='Show/Hide data repr'><svg class='icon xr-icon-database'><use xlink:href='#icon-database'></use></svg></label><div class='xr-var-attrs'><dl class='xr-attrs'><dt><span>standard_name :</span></dt><dd>projection_y_coordinate</dd></dl></div><div class='xr-var-data'><pre>[100 values with dtype=float64]</pre></div></li><li class='xr-var-item'><div class='xr-var-name'><span class='xr-has-index'>mesh2d_nFaces</span></div><div class='xr-var-dims'>(mesh2d_nFaces)</div><div class='xr-var-dtype'>int64</div><div class='xr-var-preview xr-preview'>1867 1882 1890 ... 4121 4077 1581</div><input id='attrs-920c8450-f655-460c-9724-661b9fa14027' class='xr-var-attrs-in' type='checkbox' disabled><label for='attrs-920c8450-f655-460c-9724-661b9fa14027' title='Show/Hide attributes'><svg class='icon xr-icon-file-text2'><use xlink:href='#icon-file-text2'></use></svg></label><input id='data-1fe2a839-e443-48a3-a13b-1e7f4ca370a7' class='xr-var-data-in' type='checkbox'><label for='data-1fe2a839-e443-48a3-a13b-1e7f4ca370a7' title='Show/Hide data repr'><svg class='icon xr-icon-database'><use xlink:href='#icon-database'></use></svg></label><div class='xr-var-attrs'><dl class='xr-attrs'></dl></div><div class='xr-var-data'><pre>array([1867, 1882, 1890, 1936, 1735, 1356, 1482, 1350, 1445, 1122, 2745, 1908,
1912, 1824, 240, 1654, 1647, 1696, 1164, 164, 2750, 2716, 2687, 2708,
1792, 2666, 1668, 2628, 370, 110, 2825, 2738, 2695, 2705, 2655, 2675,
2836, 2889, 226, 3035, 4297, 2864, 2722, 3146, 3069, 2820, 2804, 2907,
2904, 214, 3277, 3279, 3056, 3183, 3022, 3006, 2850, 2818, 2991, 2997,
3250, 3259, 3138, 3140, 2964, 3002, 2953, 2935, 4229, 4251, 3291, 3246,
3089, 4302, 3088, 4218, 4117, 4203, 4241, 4260, 1945, 3377, 3378, 4675,
4562, 4173, 2939, 4096, 4093, 3677, 4928, 4876, 4813, 4838, 4559, 4770,
4131, 4121, 4077, 1581])</pre></div></li><li class='xr-var-item'><div class='xr-var-name'><span>mesh2d_index</span></div><div class='xr-var-dims'>(mesh2d_nFaces)</div><div class='xr-var-dtype'>int64</div><div class='xr-var-preview xr-preview'>0 1 2 3 4 5 6 ... 94 95 96 97 98 99</div><input id='attrs-a853a7d5-7130-44e0-b880-985d14752f34' class='xr-var-attrs-in' type='checkbox' disabled><label for='attrs-a853a7d5-7130-44e0-b880-985d14752f34' title='Show/Hide attributes'><svg class='icon xr-icon-file-text2'><use xlink:href='#icon-file-text2'></use></svg></label><input id='data-bd4f3f53-1b6f-40b6-93f6-c19a0c8abc7e' class='xr-var-data-in' type='checkbox'><label for='data-bd4f3f53-1b6f-40b6-93f6-c19a0c8abc7e' title='Show/Hide data repr'><svg class='icon xr-icon-database'><use xlink:href='#icon-database'></use></svg></label><div class='xr-var-attrs'><dl class='xr-attrs'></dl></div><div class='xr-var-data'><pre>array([ 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16,
17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33,
34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50,
51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67,
68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84,
85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99])</pre></div></li><li class='xr-var-item'><div class='xr-var-name'><span>mesh2d_x</span></div><div class='xr-var-dims'>(mesh2d_nFaces)</div><div class='xr-var-dtype'>float64</div><div class='xr-var-preview xr-preview'>1e+05 1.1e+05 ... 1.8e+05 1.9e+05</div><input id='attrs-d2d91db4-a6f1-447d-b36e-8f880c14d6fb' class='xr-var-attrs-in' type='checkbox' disabled><label for='attrs-d2d91db4-a6f1-447d-b36e-8f880c14d6fb' title='Show/Hide attributes'><svg class='icon xr-icon-file-text2'><use xlink:href='#icon-file-text2'></use></svg></label><input id='data-45b17b64-e9f2-441e-951e-df2f6665243f' class='xr-var-data-in' type='checkbox'><label for='data-45b17b64-e9f2-441e-951e-df2f6665243f' title='Show/Hide data repr'><svg class='icon xr-icon-database'><use xlink:href='#icon-database'></use></svg></label><div class='xr-var-attrs'><dl class='xr-attrs'></dl></div><div class='xr-var-data'><pre>array([100000., 110000., 120000., 130000., 140000., 150000., 160000.,
170000., 180000., 190000., 100000., 110000., 120000., 130000.,
140000., 150000., 160000., 170000., 180000., 190000., 100000.,
110000., 120000., 130000., 140000., 150000., 160000., 170000.,
180000., 190000., 100000., 110000., 120000., 130000., 140000.,
150000., 160000., 170000., 180000., 190000., 100000., 110000.,
120000., 130000., 140000., 150000., 160000., 170000., 180000.,
190000., 100000., 110000., 120000., 130000., 140000., 150000.,
160000., 170000., 180000., 190000., 100000., 110000., 120000.,
130000., 140000., 150000., 160000., 170000., 180000., 190000.,
100000., 110000., 120000., 130000., 140000., 150000., 160000.,
170000., 180000., 190000., 100000., 110000., 120000., 130000.,
140000., 150000., 160000., 170000., 180000., 190000., 100000.,
110000., 120000., 130000., 140000., 150000., 160000., 170000.,
180000., 190000.])</pre></div></li><li class='xr-var-item'><div class='xr-var-name'><span>mesh2d_y</span></div><div class='xr-var-dims'>(mesh2d_nFaces)</div><div class='xr-var-dtype'>float64</div><div class='xr-var-preview xr-preview'>4e+05 4e+05 ... 4.9e+05 4.9e+05</div><input id='attrs-820446fa-3a76-4b9d-bd16-5e55b28e11f9' class='xr-var-attrs-in' type='checkbox' disabled><label for='attrs-820446fa-3a76-4b9d-bd16-5e55b28e11f9' title='Show/Hide attributes'><svg class='icon xr-icon-file-text2'><use xlink:href='#icon-file-text2'></use></svg></label><input id='data-9e3fae9a-0a7c-4850-bd59-ae0bcfad5d3f' class='xr-var-data-in' type='checkbox'><label for='data-9e3fae9a-0a7c-4850-bd59-ae0bcfad5d3f' title='Show/Hide data repr'><svg class='icon xr-icon-database'><use xlink:href='#icon-database'></use></svg></label><div class='xr-var-attrs'><dl class='xr-attrs'></dl></div><div class='xr-var-data'><pre>array([400000., 400000., 400000., 400000., 400000., 400000., 400000.,
400000., 400000., 400000., 410000., 410000., 410000., 410000.,
410000., 410000., 410000., 410000., 410000., 410000., 420000.,
420000., 420000., 420000., 420000., 420000., 420000., 420000.,
420000., 420000., 430000., 430000., 430000., 430000., 430000.,
430000., 430000., 430000., 430000., 430000., 440000., 440000.,
440000., 440000., 440000., 440000., 440000., 440000., 440000.,
440000., 450000., 450000., 450000., 450000., 450000., 450000.,
450000., 450000., 450000., 450000., 460000., 460000., 460000.,
460000., 460000., 460000., 460000., 460000., 460000., 460000.,
470000., 470000., 470000., 470000., 470000., 470000., 470000.,
470000., 470000., 470000., 480000., 480000., 480000., 480000.,
480000., 480000., 480000., 480000., 480000., 480000., 490000.,
490000., 490000., 490000., 490000., 490000., 490000., 490000.,
490000., 490000.])</pre></div></li></ul></div></li><li class='xr-section-item'><input id='section-867b3fab-26b2-4f9c-a87b-bb1fb33a25b2' class='xr-section-summary-in' type='checkbox' ><label for='section-867b3fab-26b2-4f9c-a87b-bb1fb33a25b2' class='xr-section-summary' >Indexes: <span>(1)</span></label><div class='xr-section-inline-details'></div><div class='xr-section-details'><ul class='xr-var-list'><li class='xr-var-item'><div class='xr-index-name'><div>mesh2d_nFaces</div></div><div class='xr-index-preview'>PandasIndex</div><input type='checkbox' disabled/><label></label><input id='index-ee5afbe1-ca8e-4cb6-91bf-8367532cb9cc' class='xr-index-data-in' type='checkbox'/><label for='index-ee5afbe1-ca8e-4cb6-91bf-8367532cb9cc' title='Show/Hide index repr'><svg class='icon xr-icon-database'><use xlink:href='#icon-database'></use></svg></label><div class='xr-index-data'><pre>PandasIndex(Index([1867, 1882, 1890, 1936, 1735, 1356, 1482, 1350, 1445, 1122, 2745, 1908,
1912, 1824, 240, 1654, 1647, 1696, 1164, 164, 2750, 2716, 2687, 2708,
1792, 2666, 1668, 2628, 370, 110, 2825, 2738, 2695, 2705, 2655, 2675,
2836, 2889, 226, 3035, 4297, 2864, 2722, 3146, 3069, 2820, 2804, 2907,
2904, 214, 3277, 3279, 3056, 3183, 3022, 3006, 2850, 2818, 2991, 2997,
3250, 3259, 3138, 3140, 2964, 3002, 2953, 2935, 4229, 4251, 3291, 3246,
3089, 4302, 3088, 4218, 4117, 4203, 4241, 4260, 1945, 3377, 3378, 4675,
4562, 4173, 2939, 4096, 4093, 3677, 4928, 4876, 4813, 4838, 4559, 4770,
4131, 4121, 4077, 1581],
dtype='int64', name='mesh2d_nFaces'))</pre></div></li></ul></div></li><li class='xr-section-item'><input id='section-be2537d3-4101-495f-9b96-f1716b2174a3' class='xr-section-summary-in' type='checkbox' checked><label for='section-be2537d3-4101-495f-9b96-f1716b2174a3' class='xr-section-summary' >Attributes: <span>(1)</span></label><div class='xr-section-inline-details'></div><div class='xr-section-details'><dl class='xr-attrs'><dt><span>unit :</span></dt><dd>m NAP</dd></dl></div></li></ul></div></div>
</div>
<br />
<br />
.. GENERATED FROM PYTHON SOURCE LINES 145-146
As well as a slice with a step and multiple values:
.. GENERATED FROM PYTHON SOURCE LINES 146-151
.. code-block:: Python
da = uda.ugrid.sel(x=slice(100_000.0, 200_000.0, 10_000.0), y=[400_000.0, 430_000.0])
show_point_selection(uda, da)
da
.. image-sg:: /examples/images/sphx_glr_selection_011.png
:alt: selection
:srcset: /examples/images/sphx_glr_selection_011.png
:class: sphx-glr-single-img
.. raw:: html
<div class="output_subarea output_html rendered_html output_result">
<div><svg style="position: absolute; width: 0; height: 0; overflow: hidden">
<defs>
<symbol id="icon-database" viewBox="0 0 32 32">
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<path d="M16 17c-8.837 0-16-2.239-16-5v6c0 2.761 7.163 5 16 5s16-2.239 16-5v-6c0 2.761-7.163 5-16 5z"></path>
<path d="M16 26c-8.837 0-16-2.239-16-5v6c0 2.761 7.163 5 16 5s16-2.239 16-5v-6c0 2.761-7.163 5-16 5z"></path>
</symbol>
<symbol id="icon-file-text2" viewBox="0 0 32 32">
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<path d="M23 22h-14c-0.552 0-1-0.448-1-1s0.448-1 1-1h14c0.552 0 1 0.448 1 1s-0.448 1-1 1z"></path>
<path d="M23 18h-14c-0.552 0-1-0.448-1-1s0.448-1 1-1h14c0.552 0 1 0.448 1 1s-0.448 1-1 1z"></path>
</symbol>
</defs>
</svg>
<style>/* CSS stylesheet for displaying xarray objects in jupyterlab.
*
*/
:root {
--xr-font-color0: var(
--jp-content-font-color0,
var(--pst-color-text-base rgba(0, 0, 0, 1))
);
--xr-font-color2: var(
--jp-content-font-color2,
var(--pst-color-text-base, rgba(0, 0, 0, 0.54))
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--xr-font-color3: var(
--jp-content-font-color3,
var(--pst-color-text-base, rgba(0, 0, 0, 0.38))
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--xr-border-color: var(
--jp-border-color2,
hsl(from var(--pst-color-on-background, white) h s calc(l - 10))
);
--xr-disabled-color: var(
--jp-layout-color3,
hsl(from var(--pst-color-on-background, white) h s calc(l - 40))
);
--xr-background-color: var(
--jp-layout-color0,
var(--pst-color-on-background, white)
);
--xr-background-color-row-even: var(
--jp-layout-color1,
hsl(from var(--pst-color-on-background, white) h s calc(l - 5))
);
--xr-background-color-row-odd: var(
--jp-layout-color2,
hsl(from var(--pst-color-on-background, white) h s calc(l - 15))
);
}
html[theme="dark"],
html[data-theme="dark"],
body[data-theme="dark"],
body.vscode-dark {
--xr-font-color0: var(
--jp-content-font-color0,
var(--pst-color-text-base, rgba(255, 255, 255, 1))
);
--xr-font-color2: var(
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var(--pst-color-text-base, rgba(255, 255, 255, 0.54))
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--xr-font-color3: var(
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var(--pst-color-text-base, rgba(255, 255, 255, 0.38))
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--xr-border-color: var(
--jp-border-color2,
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--xr-disabled-color: var(
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--xr-background-color: var(
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--xr-background-color-row-even: var(
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--xr-background-color-row-odd: var(
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);
}
.xr-wrap {
display: block !important;
min-width: 300px;
max-width: 700px;
}
.xr-text-repr-fallback {
/* fallback to plain text repr when CSS is not injected (untrusted notebook) */
display: none;
}
.xr-header {
padding-top: 6px;
padding-bottom: 6px;
margin-bottom: 4px;
border-bottom: solid 1px var(--xr-border-color);
}
.xr-header > div,
.xr-header > ul {
display: inline;
margin-top: 0;
margin-bottom: 0;
}
.xr-obj-type,
.xr-array-name {
margin-left: 2px;
margin-right: 10px;
}
.xr-obj-type {
color: var(--xr-font-color2);
}
.xr-sections {
padding-left: 0 !important;
display: grid;
grid-template-columns: 150px auto auto 1fr 0 20px 0 20px;
}
.xr-section-item {
display: contents;
}
.xr-section-item input {
display: inline-block;
opacity: 0;
height: 0;
}
.xr-section-item input + label {
color: var(--xr-disabled-color);
border: 2px solid transparent !important;
}
.xr-section-item input:enabled + label {
cursor: pointer;
color: var(--xr-font-color2);
}
.xr-section-item input:focus + label {
border: 2px solid var(--xr-font-color0) !important;
}
.xr-section-item input:enabled + label:hover {
color: var(--xr-font-color0);
}
.xr-section-summary {
grid-column: 1;
color: var(--xr-font-color2);
font-weight: 500;
}
.xr-section-summary > span {
display: inline-block;
padding-left: 0.5em;
}
.xr-section-summary-in:disabled + label {
color: var(--xr-font-color2);
}
.xr-section-summary-in + label:before {
display: inline-block;
content: "►";
font-size: 11px;
width: 15px;
text-align: center;
}
.xr-section-summary-in:disabled + label:before {
color: var(--xr-disabled-color);
}
.xr-section-summary-in:checked + label:before {
content: "▼";
}
.xr-section-summary-in:checked + label > span {
display: none;
}
.xr-section-summary,
.xr-section-inline-details {
padding-top: 4px;
padding-bottom: 4px;
}
.xr-section-inline-details {
grid-column: 2 / -1;
}
.xr-section-details {
display: none;
grid-column: 1 / -1;
margin-bottom: 5px;
}
.xr-section-summary-in:checked ~ .xr-section-details {
display: contents;
}
.xr-array-wrap {
grid-column: 1 / -1;
display: grid;
grid-template-columns: 20px auto;
}
.xr-array-wrap > label {
grid-column: 1;
vertical-align: top;
}
.xr-preview {
color: var(--xr-font-color3);
}
.xr-array-preview,
.xr-array-data {
padding: 0 5px !important;
grid-column: 2;
}
.xr-array-data,
.xr-array-in:checked ~ .xr-array-preview {
display: none;
}
.xr-array-in:checked ~ .xr-array-data,
.xr-array-preview {
display: inline-block;
}
.xr-dim-list {
display: inline-block !important;
list-style: none;
padding: 0 !important;
margin: 0;
}
.xr-dim-list li {
display: inline-block;
padding: 0;
margin: 0;
}
.xr-dim-list:before {
content: "(";
}
.xr-dim-list:after {
content: ")";
}
.xr-dim-list li:not(:last-child):after {
content: ",";
padding-right: 5px;
}
.xr-has-index {
font-weight: bold;
}
.xr-var-list,
.xr-var-item {
display: contents;
}
.xr-var-item > div,
.xr-var-item label,
.xr-var-item > .xr-var-name span {
background-color: var(--xr-background-color-row-even);
border-color: var(--xr-background-color-row-odd);
margin-bottom: 0;
padding-top: 2px;
}
.xr-var-item > .xr-var-name:hover span {
padding-right: 5px;
}
.xr-var-list > li:nth-child(odd) > div,
.xr-var-list > li:nth-child(odd) > label,
.xr-var-list > li:nth-child(odd) > .xr-var-name span {
background-color: var(--xr-background-color-row-odd);
border-color: var(--xr-background-color-row-even);
}
.xr-var-name {
grid-column: 1;
}
.xr-var-dims {
grid-column: 2;
}
.xr-var-dtype {
grid-column: 3;
text-align: right;
color: var(--xr-font-color2);
}
.xr-var-preview {
grid-column: 4;
}
.xr-index-preview {
grid-column: 2 / 5;
color: var(--xr-font-color2);
}
.xr-var-name,
.xr-var-dims,
.xr-var-dtype,
.xr-preview,
.xr-attrs dt {
white-space: nowrap;
overflow: hidden;
text-overflow: ellipsis;
padding-right: 10px;
}
.xr-var-name:hover,
.xr-var-dims:hover,
.xr-var-dtype:hover,
.xr-attrs dt:hover {
overflow: visible;
width: auto;
z-index: 1;
}
.xr-var-attrs,
.xr-var-data,
.xr-index-data {
display: none;
border-top: 2px dotted var(--xr-background-color);
padding-bottom: 20px !important;
padding-top: 10px !important;
}
.xr-var-attrs-in + label,
.xr-var-data-in + label,
.xr-index-data-in + label {
padding: 0 1px;
}
.xr-var-attrs-in:checked ~ .xr-var-attrs,
.xr-var-data-in:checked ~ .xr-var-data,
.xr-index-data-in:checked ~ .xr-index-data {
display: block;
}
.xr-var-data > table {
float: right;
}
.xr-var-data > pre,
.xr-index-data > pre,
.xr-var-data > table > tbody > tr {
background-color: transparent !important;
}
.xr-var-name span,
.xr-var-data,
.xr-index-name div,
.xr-index-data,
.xr-attrs {
padding-left: 25px !important;
}
.xr-attrs,
.xr-var-attrs,
.xr-var-data,
.xr-index-data {
grid-column: 1 / -1;
}
dl.xr-attrs {
padding: 0;
margin: 0;
display: grid;
grid-template-columns: 125px auto;
}
.xr-attrs dt,
.xr-attrs dd {
padding: 0;
margin: 0;
float: left;
padding-right: 10px;
width: auto;
}
.xr-attrs dt {
font-weight: normal;
grid-column: 1;
}
.xr-attrs dt:hover span {
display: inline-block;
background: var(--xr-background-color);
padding-right: 10px;
}
.xr-attrs dd {
grid-column: 2;
white-space: pre-wrap;
word-break: break-all;
}
.xr-icon-database,
.xr-icon-file-text2,
.xr-no-icon {
display: inline-block;
vertical-align: middle;
width: 1em;
height: 1.5em !important;
stroke-width: 0;
stroke: currentColor;
fill: currentColor;
}
.xr-var-attrs-in:checked + label > .xr-icon-file-text2,
.xr-var-data-in:checked + label > .xr-icon-database,
.xr-index-data-in:checked + label > .xr-icon-database {
color: var(--xr-font-color0);
filter: drop-shadow(1px 1px 5px var(--xr-font-color2));
stroke-width: 0.8px;
}
</style><pre class='xr-text-repr-fallback'><xarray.DataArray 'elevation' (mesh2d_nFaces: 20)> Size: 80B
[20 values with dtype=float32]
Coordinates:
mesh2d_face_x (mesh2d_nFaces) float64 160B ...
mesh2d_face_y (mesh2d_nFaces) float64 160B ...
* mesh2d_nFaces (mesh2d_nFaces) int64 160B 1867 1882 1890 ... 2889 226 3035
mesh2d_index (mesh2d_nFaces) int64 160B 0 1 2 3 4 5 ... 14 15 16 17 18 19
mesh2d_x (mesh2d_nFaces) float64 160B 1e+05 1.1e+05 ... 1.9e+05
mesh2d_y (mesh2d_nFaces) float64 160B 4e+05 4e+05 ... 4.3e+05 4.3e+05
Attributes:
unit: m NAP</pre><div class='xr-wrap' style='display:none'><div class='xr-header'><div class='xr-obj-type'>xarray.DataArray</div><div class='xr-array-name'>'elevation'</div><ul class='xr-dim-list'><li><span class='xr-has-index'>mesh2d_nFaces</span>: 20</li></ul></div><ul class='xr-sections'><li class='xr-section-item'><div class='xr-array-wrap'><input id='section-f3289a47-a505-418a-816f-34cbe0e01977' class='xr-array-in' type='checkbox' checked><label for='section-f3289a47-a505-418a-816f-34cbe0e01977' title='Show/hide data repr'><svg class='icon xr-icon-database'><use xlink:href='#icon-database'></use></svg></label><div class='xr-array-preview xr-preview'><span>...</span></div><div class='xr-array-data'><pre>[20 values with dtype=float32]</pre></div></div></li><li class='xr-section-item'><input id='section-3cf49802-bd2d-44d1-94e9-28f681e4c2de' class='xr-section-summary-in' type='checkbox' checked><label for='section-3cf49802-bd2d-44d1-94e9-28f681e4c2de' class='xr-section-summary' >Coordinates: <span>(6)</span></label><div class='xr-section-inline-details'></div><div class='xr-section-details'><ul class='xr-var-list'><li class='xr-var-item'><div class='xr-var-name'><span>mesh2d_face_x</span></div><div class='xr-var-dims'>(mesh2d_nFaces)</div><div class='xr-var-dtype'>float64</div><div class='xr-var-preview xr-preview'>...</div><input id='attrs-a56dbe3d-8e1d-44b6-ba62-75c3dee4a2b4' class='xr-var-attrs-in' type='checkbox' ><label for='attrs-a56dbe3d-8e1d-44b6-ba62-75c3dee4a2b4' title='Show/Hide attributes'><svg class='icon xr-icon-file-text2'><use xlink:href='#icon-file-text2'></use></svg></label><input id='data-a296d4b0-c07f-48ff-8e02-a35579ea3c09' class='xr-var-data-in' type='checkbox'><label for='data-a296d4b0-c07f-48ff-8e02-a35579ea3c09' title='Show/Hide data repr'><svg class='icon xr-icon-database'><use xlink:href='#icon-database'></use></svg></label><div class='xr-var-attrs'><dl class='xr-attrs'><dt><span>standard_name :</span></dt><dd>projection_x_coordinate</dd></dl></div><div class='xr-var-data'><pre>[20 values with dtype=float64]</pre></div></li><li class='xr-var-item'><div class='xr-var-name'><span>mesh2d_face_y</span></div><div class='xr-var-dims'>(mesh2d_nFaces)</div><div class='xr-var-dtype'>float64</div><div class='xr-var-preview xr-preview'>...</div><input id='attrs-2c9c75a8-475f-4928-bf4b-bdf2d9fbd545' class='xr-var-attrs-in' type='checkbox' ><label for='attrs-2c9c75a8-475f-4928-bf4b-bdf2d9fbd545' title='Show/Hide attributes'><svg class='icon xr-icon-file-text2'><use xlink:href='#icon-file-text2'></use></svg></label><input id='data-3217d770-96bd-4873-9da8-e7d85a9982b4' class='xr-var-data-in' type='checkbox'><label for='data-3217d770-96bd-4873-9da8-e7d85a9982b4' title='Show/Hide data repr'><svg class='icon xr-icon-database'><use xlink:href='#icon-database'></use></svg></label><div class='xr-var-attrs'><dl class='xr-attrs'><dt><span>standard_name :</span></dt><dd>projection_y_coordinate</dd></dl></div><div class='xr-var-data'><pre>[20 values with dtype=float64]</pre></div></li><li class='xr-var-item'><div class='xr-var-name'><span class='xr-has-index'>mesh2d_nFaces</span></div><div class='xr-var-dims'>(mesh2d_nFaces)</div><div class='xr-var-dtype'>int64</div><div class='xr-var-preview xr-preview'>1867 1882 1890 ... 2889 226 3035</div><input id='attrs-55d28397-22fe-49ef-ba1a-29cb08fae34d' class='xr-var-attrs-in' type='checkbox' disabled><label for='attrs-55d28397-22fe-49ef-ba1a-29cb08fae34d' title='Show/Hide attributes'><svg class='icon xr-icon-file-text2'><use xlink:href='#icon-file-text2'></use></svg></label><input id='data-e12db839-f492-49ce-ae00-c5e6a832b535' class='xr-var-data-in' type='checkbox'><label for='data-e12db839-f492-49ce-ae00-c5e6a832b535' title='Show/Hide data repr'><svg class='icon xr-icon-database'><use xlink:href='#icon-database'></use></svg></label><div class='xr-var-attrs'><dl class='xr-attrs'></dl></div><div class='xr-var-data'><pre>array([1867, 1882, 1890, 1936, 1735, 1356, 1482, 1350, 1445, 1122, 2825, 2738,
2695, 2705, 2655, 2675, 2836, 2889, 226, 3035])</pre></div></li><li class='xr-var-item'><div class='xr-var-name'><span>mesh2d_index</span></div><div class='xr-var-dims'>(mesh2d_nFaces)</div><div class='xr-var-dtype'>int64</div><div class='xr-var-preview xr-preview'>0 1 2 3 4 5 6 ... 14 15 16 17 18 19</div><input id='attrs-7da51635-b30f-46a9-bda8-ad13a8d95de6' class='xr-var-attrs-in' type='checkbox' disabled><label for='attrs-7da51635-b30f-46a9-bda8-ad13a8d95de6' title='Show/Hide attributes'><svg class='icon xr-icon-file-text2'><use xlink:href='#icon-file-text2'></use></svg></label><input id='data-01fa22ef-bcce-4fc9-bec8-d52ae49449d3' class='xr-var-data-in' type='checkbox'><label for='data-01fa22ef-bcce-4fc9-bec8-d52ae49449d3' title='Show/Hide data repr'><svg class='icon xr-icon-database'><use xlink:href='#icon-database'></use></svg></label><div class='xr-var-attrs'><dl class='xr-attrs'></dl></div><div class='xr-var-data'><pre>array([ 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16,
17, 18, 19])</pre></div></li><li class='xr-var-item'><div class='xr-var-name'><span>mesh2d_x</span></div><div class='xr-var-dims'>(mesh2d_nFaces)</div><div class='xr-var-dtype'>float64</div><div class='xr-var-preview xr-preview'>1e+05 1.1e+05 ... 1.8e+05 1.9e+05</div><input id='attrs-4c500cd4-6457-4ed0-926c-6ec7c4381905' class='xr-var-attrs-in' type='checkbox' disabled><label for='attrs-4c500cd4-6457-4ed0-926c-6ec7c4381905' title='Show/Hide attributes'><svg class='icon xr-icon-file-text2'><use xlink:href='#icon-file-text2'></use></svg></label><input id='data-851f3014-5a5c-4d44-be9e-e62165066e98' class='xr-var-data-in' type='checkbox'><label for='data-851f3014-5a5c-4d44-be9e-e62165066e98' title='Show/Hide data repr'><svg class='icon xr-icon-database'><use xlink:href='#icon-database'></use></svg></label><div class='xr-var-attrs'><dl class='xr-attrs'></dl></div><div class='xr-var-data'><pre>array([100000., 110000., 120000., 130000., 140000., 150000., 160000.,
170000., 180000., 190000., 100000., 110000., 120000., 130000.,
140000., 150000., 160000., 170000., 180000., 190000.])</pre></div></li><li class='xr-var-item'><div class='xr-var-name'><span>mesh2d_y</span></div><div class='xr-var-dims'>(mesh2d_nFaces)</div><div class='xr-var-dtype'>float64</div><div class='xr-var-preview xr-preview'>4e+05 4e+05 ... 4.3e+05 4.3e+05</div><input id='attrs-5e363680-6440-4ce3-999d-2b5f07e8efa0' class='xr-var-attrs-in' type='checkbox' disabled><label for='attrs-5e363680-6440-4ce3-999d-2b5f07e8efa0' title='Show/Hide attributes'><svg class='icon xr-icon-file-text2'><use xlink:href='#icon-file-text2'></use></svg></label><input id='data-019bffc4-5d6c-416a-9522-4db718cf86e8' class='xr-var-data-in' type='checkbox'><label for='data-019bffc4-5d6c-416a-9522-4db718cf86e8' title='Show/Hide data repr'><svg class='icon xr-icon-database'><use xlink:href='#icon-database'></use></svg></label><div class='xr-var-attrs'><dl class='xr-attrs'></dl></div><div class='xr-var-data'><pre>array([400000., 400000., 400000., 400000., 400000., 400000., 400000.,
400000., 400000., 400000., 430000., 430000., 430000., 430000.,
430000., 430000., 430000., 430000., 430000., 430000.])</pre></div></li></ul></div></li><li class='xr-section-item'><input id='section-5963b070-f707-4305-ad86-b010056ada2b' class='xr-section-summary-in' type='checkbox' ><label for='section-5963b070-f707-4305-ad86-b010056ada2b' class='xr-section-summary' >Indexes: <span>(1)</span></label><div class='xr-section-inline-details'></div><div class='xr-section-details'><ul class='xr-var-list'><li class='xr-var-item'><div class='xr-index-name'><div>mesh2d_nFaces</div></div><div class='xr-index-preview'>PandasIndex</div><input type='checkbox' disabled/><label></label><input id='index-beb53bdf-dc07-4fff-9d9c-23f5464fcf77' class='xr-index-data-in' type='checkbox'/><label for='index-beb53bdf-dc07-4fff-9d9c-23f5464fcf77' title='Show/Hide index repr'><svg class='icon xr-icon-database'><use xlink:href='#icon-database'></use></svg></label><div class='xr-index-data'><pre>PandasIndex(Index([1867, 1882, 1890, 1936, 1735, 1356, 1482, 1350, 1445, 1122, 2825, 2738,
2695, 2705, 2655, 2675, 2836, 2889, 226, 3035],
dtype='int64', name='mesh2d_nFaces'))</pre></div></li></ul></div></li><li class='xr-section-item'><input id='section-6f7cf4b9-3d44-42e6-98fb-73246a80d278' class='xr-section-summary-in' type='checkbox' checked><label for='section-6f7cf4b9-3d44-42e6-98fb-73246a80d278' class='xr-section-summary' >Attributes: <span>(1)</span></label><div class='xr-section-inline-details'></div><div class='xr-section-details'><dl class='xr-attrs'><dt><span>unit :</span></dt><dd>m NAP</dd></dl></div></li></ul></div></div>
</div>
<br />
<br />
.. GENERATED FROM PYTHON SOURCE LINES 152-163
Line selection
--------------
Since line data can be represented as an ordinary xarray DataArray with x
and y coordinates, all line selection result in xarray DataArrays rather
than UgridDataArrays with an associated unstructured grid topology.
Line selection is performed by finding all faces that are intersected by
the line.
We start by defining a utility to show the selection again:
.. GENERATED FROM PYTHON SOURCE LINES 163-178
.. code-block:: Python
def show_line_selection(uda, da, line_x=None, line_y=None):
_, (ax0, ax1) = plt.subplots(ncols=2, figsize=(10, 5))
uda.ugrid.plot(ax=ax0, vmin=-20, vmax=90, cmap="terrain")
da.plot(ax=ax1, x="mesh2d_s")
if line_x is None:
ax0.axhline(line_y, color="red")
elif line_y is None:
ax0.axvline(line_x, color="red")
else:
ax0.plot(line_x, line_y, color="red")
ax0.set_aspect(1.0)
.. GENERATED FROM PYTHON SOURCE LINES 179-181
A single value for either x or y in ``.ugrid.sel`` will select values along a
line:
.. GENERATED FROM PYTHON SOURCE LINES 181-185
.. code-block:: Python
da = uda.ugrid.sel(y=465_000.0)
show_line_selection(uda, da, line_y=465_000.0)
.. image-sg:: /examples/images/sphx_glr_selection_012.png
:alt: selection
:srcset: /examples/images/sphx_glr_selection_012.png
:class: sphx-glr-single-img
.. GENERATED FROM PYTHON SOURCE LINES 186-188
Line segments that are not axis aligned can be selected with
``.ugrid.intersect_line``:
.. GENERATED FROM PYTHON SOURCE LINES 188-192
.. code-block:: Python
da = uda.ugrid.intersect_line(start=(60_000.0, 400_000.0), end=(190_000.0, 475_000.0))
show_line_selection(uda, da, (60_000.0, 190_000.0), (400_000.0, 475_000.0))
.. image-sg:: /examples/images/sphx_glr_selection_013.png
:alt: selection
:srcset: /examples/images/sphx_glr_selection_013.png
:class: sphx-glr-single-img
.. GENERATED FROM PYTHON SOURCE LINES 193-194
Linestrings can be selected with ``.ugrid.intersect_linestring``:
.. GENERATED FROM PYTHON SOURCE LINES 194-207
.. code-block:: Python
linestring = shapely.geometry.LineString(
[
(60_000.0, 400_000.0),
(190_000.0, 400_000.0),
(120_000.0, 575_000.0),
(250_000.0, 575_000.0),
]
)
da = uda.ugrid.intersect_linestring(linestring)
show_line_selection(uda, da, *shapely.get_coordinates(linestring).T)
.. image-sg:: /examples/images/sphx_glr_selection_014.png
:alt: selection
:srcset: /examples/images/sphx_glr_selection_014.png
:class: sphx-glr-single-img
.. GENERATED FROM PYTHON SOURCE LINES 208-209
This will work for any type of shapely line:
.. GENERATED FROM PYTHON SOURCE LINES 209-214
.. code-block:: Python
ring = shapely.geometry.Point(155_000.0, 463_000).buffer(50_000.0).exterior
da = uda.ugrid.intersect_linestring(ring)
show_line_selection(uda, da, *shapely.get_coordinates(ring).T)
.. image-sg:: /examples/images/sphx_glr_selection_015.png
:alt: selection
:srcset: /examples/images/sphx_glr_selection_015.png
:class: sphx-glr-single-img
.. GENERATED FROM PYTHON SOURCE LINES 215-221
Index selection
---------------
We may also use ordinary index selection to create a subset. This does not
require the ``.ugrid`` accessor. For example, to take only the first
thousands faces:
.. GENERATED FROM PYTHON SOURCE LINES 221-225
.. code-block:: Python
subset = uda.isel(mesh2d_nFaces=np.arange(1000))
subset.ugrid.plot(vmin=-20, vmax=90, cmap="terrain", aspect=1, size=5)
.. image-sg:: /examples/images/sphx_glr_selection_016.png
:alt: selection
:srcset: /examples/images/sphx_glr_selection_016.png
:class: sphx-glr-single-img
.. rst-class:: sphx-glr-script-out
.. code-block:: none
<matplotlib.collections.PolyCollection object at 0x7f74d433bb00>
.. GENERATED FROM PYTHON SOURCE LINES 226-238
For a 2D topology, selecting faces by an index always results in a valid
topology. However, selecting by node or edge does not give a guarantee that
the result forms a valid 2D topology: e.g. if we only select two nodes, or
only two edges from a face, the result cannot form a valid 2D face.
To avoid generating invalid topologies, xugrid always checks whether the
result of a selection results in a valid 2D topology and raises an error if
the result is invalid.
In general, index selection should only be performed on the "core" dimension
of the UGRID topology. This is the edge dimension for 1D topologies, and the
face dimension for 2D topologies.
.. rst-class:: sphx-glr-timing
**Total running time of the script:** (0 minutes 3.646 seconds)
.. _sphx_glr_download_examples_selection.py:
.. only:: html
.. container:: sphx-glr-footer sphx-glr-footer-example
.. container:: sphx-glr-download sphx-glr-download-jupyter
:download:`Download Jupyter notebook: selection.ipynb <selection.ipynb>`
.. container:: sphx-glr-download sphx-glr-download-python
:download:`Download Python source code: selection.py <selection.py>`
.. container:: sphx-glr-download sphx-glr-download-zip
:download:`Download zipped: selection.zip <selection.zip>`
.. only:: html
.. rst-class:: sphx-glr-signature
`Gallery generated by Sphinx-Gallery <https://sphinx-gallery.github.io>`_