Remove unnecessary parameters

Author: tonysyu

examples/pylab_examples/histogram_demo_multihist.py

@@ -5,8 +5,7 @@
 fig, axes = plt.subplots(nrows=2, ncols=2)
 ax0, ax1, ax2, ax3 = axes.flat
 
-mu, sigma = 200, 25
-x = mu + sigma*np.random.randn(1000,3)
+x = np.random.randn(1000,3)
 
 colors = ['crimson', 'burlywood', 'chartreuse']
 n, bins, patches = ax0.hist(x, 10, normed=1, histtype='bar',
@@ -22,7 +21,7 @@
 ax2.set_title('stepfilled')
 
 # Make a multiple-histogram of data-sets with different length.
-x_multi = [mu + sigma*np.random.randn(n) for n in [10000, 5000, 2000]]
+x_multi = [np.random.randn(n) for n in [10000, 5000, 2000]]
 
 n, bins, patches = ax3.hist(x_multi, 10, histtype='bar')
 ax3.set_title('different sample sizes')