.. _pylab_examples-colorbar_tick_labelling_demo:

pylab_examples example code: colorbar_tick_labelling_demo.py
============================================================



.. plot:: /builddir/build/BUILD/matplotlib-1.3.1/doc/mpl_examples/pylab_examples/colorbar_tick_labelling_demo.py

::

    """Produce custom labelling for a colorbar.
    
    Contributed by Scott Sinclair
    """
    
    import matplotlib.pyplot as plt
    import numpy as np
    from matplotlib import cm
    from numpy.random import randn
    
    # Make plot with vertical (default) colorbar
    fig, ax = plt.subplots()
    
    data = np.clip(randn(250, 250), -1, 1)
    
    cax = ax.imshow(data, interpolation='nearest', cmap=cm.coolwarm)
    ax.set_title('Gaussian noise with vertical colorbar')
    
    # Add colorbar, make sure to specify tick locations to match desired ticklabels
    cbar = fig.colorbar(cax, ticks=[-1, 0, 1])
    cbar.ax.set_yticklabels(['< -1', '0', '> 1'])# vertically oriented colorbar
    
    # Make plot with horizontal colorbar
    fig, ax = plt.subplots()
    
    data = np.clip(randn(250, 250), -1, 1)
    
    cax = ax.imshow(data, interpolation='nearest', cmap=cm.afmhot)
    ax.set_title('Gaussian noise with horizontal colorbar')
    
    cbar = fig.colorbar(cax, ticks=[-1, 0, 1], orientation='horizontal')
    cbar.ax.set_xticklabels(['Low', 'Medium', 'High'])# horizontal colorbar
    
    plt.show()
    

Keywords: python, matplotlib, pylab, example, codex (see :ref:`how-to-search-examples`)