Added example of a standalone colorbar.

efiring · efiring · commit 9a8a48be393b · 2007-09-03T18:27:22.000Z
svn path=/trunk/matplotlib/; revision=3769
diff --git a/examples/colorbar_only.py b/examples/colorbar_only.py
@@ -0,0 +1,28 @@
+'''
+Make a colorbar as a separate figure.
+'''
+
+import pylab
+import matplotlib as mpl
+
+# Make a figure and axes with dimensions as desired.
+fig = pylab.figure(figsize=(8,1.5))
+ax = fig.add_axes([0.05, 0.4, 0.9, 0.5])
+
+# Set the colormap and norm to correspond to the data for which
+# the colorbar will be used.
+cmap = mpl.cm.cool
+norm = mpl.colors.Normalize(vmin=5, vmax=10)
+
+# ColorbarBase derives from ScalarMappable and puts a colorbar
+# in a specified axes, so it has everything needed for a
+# standalone colorbar.  There are many more kwargs, but the
+# following gives a basic continuous colorbar with ticks
+# and labels.
+cb = mpl.colorbar.ColorbarBase(ax, cmap=cmap,
+                                   norm=norm,
+                                   orientation='horizontal')
+cb.set_label('Some Units')
+
+pylab.show()
+
