DOC: add whats new

jklymak · jklymak · commit c9984fe34752 · 2019-01-03T09:49:02.000-08:00
diff --git a/doc/users/next_whats_new/2018-11-25-JMK.rst b/doc/users/next_whats_new/2018-11-25-JMK.rst
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+:orphan:
+
+New `~.scale.FuncScale` added for arbitrary axes scales
+````````````````````````````````````````````````````````
+
+A new `~.scale.FuncScale` class was added (and `~.scale.FuncTransform`)
+to allow the user to have arbitrary scale transformations without having to
+write a new subclass of `~.scale.ScaleBase`.  This can be accessed by
+``ax.set_yscale('function', functions=(forward, inverse))``, where
+``forward`` and ``inverse`` are callables that return the scale transform and
+its inverse.  See the last example in :doc:`/gallery/scales/scales`.
