SF.net SVN: matplotlib:[6884] branches/v0_98_5_maint/examples/ pylab_examples/show_colormaps.py

[<ry...@us...>]

Revision: 6884
          http://matplotlib.svn.sourceforge.net/matplotlib/?rev=6884&view=rev
Author:   ryanmay
Date:     2009-02-05 17:55:51 +0000 (Thu, 05 Feb 2009)

Log Message:
-----------
Add an example that displays all of the colormaps available.  This is based on code in the scipy.org cookbook. This should make a nice addition to the gallery.

Added Paths:
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    branches/v0_98_5_maint/examples/pylab_examples/show_colormaps.py

Added: branches/v0_98_5_maint/examples/pylab_examples/show_colormaps.py
===================================================================
--- branches/v0_98_5_maint/examples/pylab_examples/show_colormaps.py	                        (rev 0)
+++ branches/v0_98_5_maint/examples/pylab_examples/show_colormaps.py	2009-02-05 17:55:51 UTC (rev 6884)
@@ -0,0 +1,25 @@
+# This example comes from the Cookbook on www.scipy.org.  According to the
+# history, Andrew Straw did the conversion from an old page, but it is
+# unclear who the original author is.
+import numpy as np
+import matplotlib.pyplot as plt
+
+a = np.linspace(0, 1, 256).reshape(1,-1)
+a = np.vstack((a,a))
+
+# Get a list of the colormaps in matplotlib.  Ignore the ones that end with
+# '_r' because these are simply reversed versions of ones that don't end
+# with '_r'
+maps = sorted(m for m in plt.cm.datad if not m.endswith("_r"))
+nmaps = len(maps) + 1
+
+fig = plt.figure(figsize=(5,10))
+fig.subplots_adjust(top=0.99, bottom=0.01, left=0.2, right=0.99)
+for i,m in enumerate(maps):
+    ax = plt.subplot(nmaps, 1, i+1)
+    plt.axis("off")
+    plt.imshow(a, aspect='auto', cmap=plt.get_cmap(m), origin='lower')
+    pos = list(ax.get_position().bounds)
+    fig.text(pos[0] - 0.01, pos[1], m, fontsize=10, horizontalalignment='right')
+
+plt.show()


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