added a reversing section

story645 · story645 · commit b51f6d33903b · 2022-09-15T19:10:55.000-04:00
diff --git a/examples/color/colormap_reference.py b/examples/color/colormap_reference.py
@@ -5,17 +5,13 @@
 
 Reference for colormaps included with Matplotlib.
 
-A reversed version of each of these colormaps is available by appending
-``_r`` to the name, e.g., ``viridis_r``.
-
 See :doc:`/tutorials/colors/colormaps` for an in-depth discussion about
 colormaps, including colorblind-friendliness.
 """
 
 import numpy as np
 import matplotlib.pyplot as plt
 
-
 cmaps = [('Perceptually Uniform Sequential', [
             'viridis', 'plasma', 'inferno', 'magma', 'cividis']),
          ('Sequential', [
@@ -40,7 +36,6 @@
             'gist_rainbow', 'rainbow', 'jet', 'turbo', 'nipy_spectral',
             'gist_ncar'])]
 
-
 gradient = np.linspace(0, 1, 256)
 gradient = np.vstack((gradient, gradient))
 
@@ -67,7 +62,17 @@ def plot_color_gradients(cmap_category, cmap_list):
 for cmap_category, cmap_list in cmaps:
     plot_color_gradients(cmap_category, cmap_list)
 
-plt.show()
+
+###############################################################################
+# Reversing a colormap
+# --------------------
+#
+# A reversed version of any colormap is available by appending ``_r`` to the
+# name, for example:
+
+plot_color_gradients("Reversed ",
+                     ['viridis_r', 'Greys_r', 'PiYG_r',
+                      'twilight_r', 'Pastel1_r', 'ocean_r'])
 
 #############################################################################
 #
