matplotlib/examples/colorbar_only.py at transforms · tecki/matplotlib · GitHub

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'''

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, 0.05, 0.9, 0.9])

# 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()