Assume pixel distance=0 if nan

The function _get_pixel_distance_along_axis does not work for geographic
axes, in which pixels that are outside of the map area cannot be
meaningfully transformed back to data coordinates. If the return value
was nan, set to 0.

Author: lpsinger

lib/matplotlib/axis.py

@@ -1008,11 +1008,15 @@ def _update_ticks(self, renderer):
             except:
                warnings.warn("Unable to find pixel distance along axis for interval padding; assuming no interval padding needed.")
                ds1 = 0.0
+            if np.isnan(ds1):
+               ds1 = 0.0
             try:
                ds2 = self._get_pixel_distance_along_axis(interval_expanded[1], +0.5)
             except:
                warnings.warn("Unable to find pixel distance along axis for interval padding; assuming no interval padding needed.")
                ds2 = 0.0
+            if np.isnan(ds2):
+               ds2 = 0.0
             interval_expanded = (interval_expanded[0] - ds1,
                                  interval_expanded[1] + ds2)