Histogram

The hist command automatically generates histograms and will return the bin counts or probabilities

    from matplotlib import rcParams
    rcParams['text.fontname'] = 'cmr10'
    import pylab as pl

    
    mu, sigma = 100, 15
    x = mu + sigma*pl.randn(10000)
    
    # the histogram of the data
    n, bins, patches = pl.hist(x, 100, normed=1)
    
    # add a 'best fit' line
    y = pl.normpdf( bins, mu, sigma)
    l = pl.plot(bins, y, 'r--', linewidth=2)
    pl.xlim(40, 160)
    
    pl.xlabel('Smarts')
    pl.ylabel('P')
    pl.title(r'$\rm{IQ:}\/ \mu=100,\/ \sigma=15$')