Merge pull request #24938 from meeseeksmachine/auto-backport-of-pr-23…

…390-on-v3.7.x Backport PR #23390 on branch v3.7.x (FIX: colorbar contour with log norm should default to log locator and formatter...)
matplotlib · Jan 11, 2023 · 1fb4d50 · 1fb4d50
2 parents a6cf357 + a3a66a9
commit 1fb4d50
Show file tree

Hide file tree

Showing 3 changed files with 3,403 additions and 2 deletions.
diff --git a/lib/matplotlib/colorbar.py b/lib/matplotlib/colorbar.py
@@ -1179,7 +1179,11 @@ def _reset_locator_formatter_scale(self):
         self._minorlocator = None
         self._formatter = None
         self._minorformatter = None
-        if (self.boundaries is not None or
+        if (isinstance(self.mappable, contour.ContourSet) and
+                isinstance(self.norm, colors.LogNorm)):
+            # if contours have lognorm, give them a log scale...
+            self._set_scale('log')
+        elif (self.boundaries is not None or
                 isinstance(self.norm, colors.BoundaryNorm)):
             if self.spacing == 'uniform':
                 funcs = (self._forward_boundaries, self._inverse_boundaries)