| ``PolyQuadMesh`` is a new class for drawing quadrilateral meshes | |
| ---------------------------------------------------------------- | |
| `~.Axes.pcolor` previously returned a flattened `.PolyCollection` with only | |
| the valid polygons (unmasked) contained within it. Now, we return a `.PolyQuadMesh`, | |
| which is a mixin incorporating the usefulness of 2D array and mesh coordinates | |
| handling, but still inheriting the draw methods of `.PolyCollection`, which enables | |
| more control over the rendering properties than a normal `.QuadMesh` that is | |
| returned from `~.Axes.pcolormesh`. The new class subclasses `.PolyCollection` and thus | |
| should still behave the same as before. This new class keeps track of the mask for | |
| the user and updates the Polygons that are sent to the renderer appropriately. | |
| .. plot:: | |
| arr = np.arange(12).reshape((3, 4)) | |
| fig, ax = plt.subplots() | |
| pc = ax.pcolor(arr) | |
| # Mask one element and show that the hatch is also not drawn | |
| # over that region | |
| pc.set_array(np.ma.masked_equal(arr, 5)) | |
| pc.set_hatch('//') | |
| plt.show() | |