added reference to mpldatacursor

ericmjl · ericmjl · commit 104f3728151f · 2015-09-26T19:00:51.000-04:00
diff --git a/examples/pylab_examples/cursor_demo.py b/examples/pylab_examples/cursor_demo.py
@@ -6,7 +6,10 @@
 requires redrawing the figure with every mouse move.
 
 Faster cursoring is possible using native GUI drawing, as in
-wxcursor_demo.py
+wxcursor_demo.py. 
+
+Also, mpldatacursor can be used to achieve a similar effect. See webpage:
+https://github.com/joferkington/mpldatacursor
 """
 from __future__ import print_function
 import matplotlib.pyplot as plt
