.. _api-barchart_demo:

api example code: barchart_demo.py
==================================



.. plot:: /home/mandrake/rpm/BUILD/matplotlib-1.1.1/doc/mpl_examples/api/barchart_demo.py

::

    
    #!/usr/bin/env python
    # a bar plot with errorbars
    import numpy as np
    import matplotlib.pyplot as plt
    
    N = 5
    menMeans = (20, 35, 30, 35, 27)
    menStd =   (2, 3, 4, 1, 2)
    
    ind = np.arange(N)  # the x locations for the groups
    width = 0.35       # the width of the bars
    
    fig = plt.figure()
    ax = fig.add_subplot(111)
    rects1 = ax.bar(ind, menMeans, width, color='r', yerr=menStd)
    
    womenMeans = (25, 32, 34, 20, 25)
    womenStd =   (3, 5, 2, 3, 3)
    rects2 = ax.bar(ind+width, womenMeans, width, color='y', yerr=womenStd)
    
    # add some
    ax.set_ylabel('Scores')
    ax.set_title('Scores by group and gender')
    ax.set_xticks(ind+width)
    ax.set_xticklabels( ('G1', 'G2', 'G3', 'G4', 'G5') )
    
    ax.legend( (rects1[0], rects2[0]), ('Men', 'Women') )
    
    def autolabel(rects):
        # attach some text labels
        for rect in rects:
            height = rect.get_height()
            ax.text(rect.get_x()+rect.get_width()/2., 1.05*height, '%d'%int(height),
                    ha='center', va='bottom')
    
    autolabel(rects1)
    autolabel(rects2)
    
    plt.show()
    

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