MNT: make pcolormesh more robust to masked array underflow

jklymak · jklymak · commit 90a3971386cf · 2024-02-11T18:07:53.000-08:00
diff --git a/lib/matplotlib/axes/_axes.py b/lib/matplotlib/axes/_axes.py
@@ -5883,7 +5883,7 @@ def _pcolorargs(self, funcname, *args, shading='auto', **kwargs):
                 def _interp_grid(X):
                     # helper for below
                     if np.shape(X)[1] > 1:
-                        dX = np.diff(X, axis=1)/2.
+                        dX = np.diff(X, axis=1) * 0.5
                         if not (np.all(dX >= 0) or np.all(dX <= 0)):
                             _api.warn_external(
                                 f"The input coordinates to {funcname} are "
