hist2d: Add a note mentioning PowerNorm

bgamari · bgamari · commit d5343c0aa6b8 · 2014-03-10T12:27:08.000-04:00
diff --git a/lib/matplotlib/axes/_axes.py b/lib/matplotlib/axes/_axes.py
@@ -5807,7 +5807,9 @@ def hist2d(self, x, y, bins=10, range=None, normed=False, weights=None,
         -----
         Rendering the histogram with a logarithmic color scale is
         accomplished by passing a :class:`colors.LogNorm` instance to
-        the *norm* keyword argument.
+        the *norm* keyword argument. Likewise, power-law normalization
+        (similar in effect to gamma correction) can be accomplished with
+        :class:`colors.PowerNorm`.
 
         Examples
         --------
