Modified hline and vline examples to have only one file and linked them to the documentation

Author: NelleV

examples/pylab_examples/README

@@ -13,7 +13,7 @@ Here are some demos of how to use the matplotlib.
 
 -- subplot_demo.py - how to do multiple axes on a single plot
 
--- vline_demo.py   - working with straight lines
+-- vline_hline_demo.py   - working with straight lines
 
 -- stock_demo.py - working with large datasets.  Click on the plot and
       launch the navigation tool; wheel mouse over the navigation

examples/pylab_examples/hline_demo.py

@@ -0,0 +1,36 @@
+#!/usr/bin/env python
+
+"""
+Small demonstration of the hlines and vlines plots.
+"""
+
+from matplotlib import pyplot as plt
+from numpy import sin, exp,  absolute, pi, arange
+from numpy.random import normal
+
+
+def f(t):
+    s1 = sin(2 * pi * t)
+    e1 = exp(-t)
+    return absolute((s1 * e1)) + .05
+
+
+t = arange(0.0, 5.0, 0.1)
+s = f(t)
+nse = normal(0.0, 0.3, t.shape) * s
+
+fig = plt.figure(figsize=(12, 6))
+vax = fig.add_subplot(121)
+hax = fig.add_subplot(122)
+
+vax.plot(t, s + nse, 'b^')
+vax.vlines(t, [0], s)
+vax.set_xlabel('time (s)')
+vax.set_title('Vertical lines demo')
+
+hax.plot(s + nse, t, 'b^')
+hax.hlines(t, [0], s, lw=2)
+hax.set_xlabel('time (s)')
+hax.set_title('Horizontal lines demo')
+
+plt.show()

examples/pylab_examples/vline_demo.py

@@ -113,7 +113,7 @@
     'hist_colormapped.py',
     'histogram_demo.py',
     'histogram_demo_extended.py',
-    'hline_demo.py',
+    'vline_hline_demo.py',
 
     'image_clip_path.py',
     'image_demo.py',
@@ -199,7 +199,6 @@
     'transoffset.py',
     'unicode_demo.py',
     'vertical_ticklabels.py',
-    'vline_demo.py',
     'xcorr_demo.py',
     'zorder_demo.py',
     ]

examples/pylab_examples/vline_hline_demo.py

@@ -3681,7 +3681,7 @@ def hlines(self, y, xmin, xmax, colors='k', linestyles='solid',
 
         Example
         --------
-        .. plot:: mpl_examples/pylab_examples/hline_demo.py
+        .. plot:: mpl_examples/pylab_examples/vline_hline_demo.py
 
         See also
         --------
@@ -3765,6 +3765,10 @@ def vlines(self, x, ymin, ymax, colors='k', linestyles='solid',
         -------
         :class:`~matplotlib.collections.LineCollection`
 
+        Example
+        -------
+        .. plot:: mpl_examples/pylab_examples/vline_hline_demo.py
+
         See also
         --------
         hlines : horizontal lines