Add titles to clarify intent

Author: tonysyu

examples/pylab_examples/histogram_demo_histtypes.py

@@ -16,9 +16,12 @@
 y = normpdf( bins, mu, sigma)
 ax0.plot(bins, y, 'k--', linewidth=1.5)
 
+ax0.set_title('stepfilled')
+
 # Create a histogram by providing the bin edges (unequally spaced).
 bins = [100,150,180,195,205,220,250,300]
 n, bins, patches = ax1.hist(x, bins, normed=1, histtype='bar', rwidth=0.8)
+ax1.set_title('unequal bins')
 
 n, bins, patches = ax2.hist(x, 50, normed=1, histtype='step', cumulative=True)
 
@@ -42,9 +45,9 @@
 n, bins, patches = ax2.hist(x, bins=bins, normed=1,
     histtype='step', cumulative=-1)
 
-
 ax2.grid(True)
 ax2.set_ylim(0, 1.05)
+ax2.set_title('cumulative step')
 
 plt.tight_layout()
 plt.show()

examples/pylab_examples/histogram_demo_multihist.py

@@ -12,11 +12,14 @@
                             color=['crimson', 'burlywood', 'chartreuse'],
                             label=['Crimson', 'Burlywood', 'Chartreuse'])
 ax0.legend(prop={'size': 10})
+ax0.set_title('bar')
 
 
 n, bins, patches = ax1.hist(x, 10, normed=1, histtype='bar', stacked=True)
+ax1.set_title('stacked bar')
 
 n, bins, patches = ax2.hist(x, 10, histtype='step', stacked=True, fill=True)
+ax2.set_title('stepfilled')
 
 # Make a multiple-histogram of data-sets with different length.
 x0 = mu + sigma*np.random.randn(10000)
@@ -31,6 +34,7 @@
 w2[:len(x2)/2] = 0.5
 
 n, bins, patches = ax3.hist( [x0,x1,x2], 10, weights=[w0, w1, w2], histtype='bar')
+ax3.set_title('different sample sizes')
 
 plt.tight_layout()
 plt.show()