Added an example for histograms with histtype='step'

mmetz-bn · mmetz-bn · commit b75f7ebe0e25 · 2008-05-16T13:41:25.000Z
svn path=/trunk/matplotlib/; revision=5146
diff --git a/examples/histogram_demo_step.py b/examples/histogram_demo_step.py
@@ -0,0 +1,31 @@
+#!/usr/bin/env python
+from pylab import *
+
+mu, sigma = 100, 15
+x = mu + sigma*randn(10000)
+
+# the histogram of the data
+n, bins, patches = hist(x, 50, normed=1, histtype='step')
+setp(patches, 'facecolor', 'g', 'alpha', 0.75)
+
+# add a 'best fit' line
+y = normpdf( bins, mu, sigma)
+l = plot(bins, y, 'k--', linewidth=1)
+
+
+# overlay the first histogram with a second one
+# were the data has a smaller standard deviation
+mu, sigma = 100, 5
+x = mu + sigma*randn(10000)
+
+n, bins, patches = hist(x, 50, normed=1, histtype='step')
+setp(patches, 'facecolor', 'r', 'alpha', 0.25)
+
+y = normpdf( bins, mu, sigma)
+l = plot(bins, y, 'k--', linewidth=1)
+
+axis([40, 160, 0, 0.09])
+grid(True)
+
+#savefig('histogram_demo',dpi=72)
+show()
