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imod.visualize.quiver#

imod.visualize.quiver(u, v, ax, kwargs_quiver={})[source]#

Wraps matplotlib.quiver to draw quiver plots. Function can be used to draw flow quivers on top of a cross-section.

Parameters

  • u (xr.DataArray) –

    Two dimensional DataArray containing u component of quivers. One dimension must be “layer”, and the second dimension will be used as the x-axis for the cross-section.

    Coordinates “top” and “bottom” must be present, and must have at least the “layer” dimension (voxels) or both the “layer” and x-coordinate dimension.

    Use imod.evaluate.quiver_line() or quiver_linestring() to obtain the required DataArray.

  • v (xr.DataArray) –

    Two dimensional DataArray containing v component of quivers. One dimension must be “layer”, and the second dimension will be used as the x-axis for the cross-section.

    Coordinates “top” and “bottom” must be present, and must have at least the “layer” dimension (voxels) or both the “layer” and x-coordinate dimension.

    Use imod.evaluate.quiver_line() or quiver_linestring() to obtain the required DataArray.

  • ax (matplotlib Axes instance) – Axes to write plot to.

  • kwargs_quiver (dict) – Other optional keyword arguments for matplotlib.quiver.

Returns

The drawn quivers.

Return type

matplotlib.quiver.Quiver

Examples

First: apply evaluate.quiver_line to get the u and v components of the quivers from a three dimensional flow field. Assign top and bottom coordinates if these are not already present in the flow field data arrays.

>>> u, v = imod.evaluate.quiver_line(right, front, lower, start, end)
>>> u.assign_coords(top=top, bottom=bottom)
>>> v.assign_coords(top=top, bottom=bottom)

The quivers can then be plotted over a cross section created by imod.visualize.cross_section():

>>> imod.visualize.quiver(u, v, ax)

Quivers can easily overwhelm your plot, so it is a good idea to ‘thin out’ some of the quivers:

>>> # Only plot quivers at every 5th cell and every 3rd layer
>>> thin = {"s": slice(0, None, 5), "layer": slice(0, None, 3)}
>>> imod.visualize.quiver(u.isel(**thin), v.isel(**thin), ax)
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