Add whats new

jklymak · jklymak · commit 1f02dba6c5a2 · 2019-12-18T12:46:38.000-08:00
diff --git a/doc/users/next_whats_new/2019-12-18-pcolordropdata.rst b/doc/users/next_whats_new/2019-12-18-pcolordropdata.rst
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+Pcolor and Pcolormesh now have *dropdata* kwarg and rcParam
+-----------------------------------------------------------
+
+Previously `.axes.Axes.pcolor` and  `.axes.Axes.pcolormesh` handled
+the situation where *x* and *y* have the same (respective) size as *Z* by
+dropping the last row and column of *Z*, and *x* and *y* are regarded as the
+edges of the remaining rows and columns in *Z*.  However, most users probably
+really want *x* and *y* centered on the rows and columns of *Z*, so if
+they specify *dropdata* as True, both methods will now linearly interpolate to
+get the edges of the bins, and *x* and *y* will specify the (linear) center of
+each gridcell in the pseudocolor plot.
+
+Users can also specify this by the new :rc:`pcolor.dropdata` in their
+``.matplotlibrc`` or via `.rcParams`.
+
+See :doc:`pcolormesh </gallery/images_contours_and_fields/pcolormesh_levels>`
+for an example.  
