Cleanup and move vertical_ticklabels demo

Author: tonysyu

examples/pylab_examples/vertical_ticklabels.py

@@ -79,6 +79,10 @@
     'unicode_demo.py',
     ]
 
+files['ticks_and_spines'] = [
+    'ticklabels_demo_rotation.py',
+    ]
+
 files['subplots_axes_and_figures'] = [
     'subplot_demo.py',
     ]
@@ -237,7 +241,7 @@
     'text_rotation_relative_to_line.py',
     'text_themes.py',
     'transoffset.py',
-    'vertical_ticklabels.py',
+    'vline_demo.py',
     'xcorr_demo.py',
     'zorder_demo.py',
     ]

examples/tests/backend_driver.py

@@ -0,0 +1,16 @@
+"""
+Demo of custom tick-labels with user-defined rotation.
+"""
+import matplotlib.pyplot as plt
+
+
+x = [1, 2, 3, 4]
+y = [1, 4, 9, 6]
+labels = ['Frogs', 'Hogs', 'Bogs', 'Slogs']
+
+plt.plot(x, y, 'ro')
+# You can specify a rotation for the tick labels in degrees or with keywords.
+plt.xticks(x, labels, rotation='vertical')
+# Pad margins so that markers don't get clipped by the axes
+plt.margins(0.2)
+plt.show()