Added docstring to scatter_with_legend.py [MEP12]

Francoise Provencher · Francoise Provencher · commit d922945fbb7b · 2016-05-27T08:13:51.000-04:00
diff --git a/examples/lines_bars_and_markers/scatter_with_legend.py b/examples/lines_bars_and_markers/scatter_with_legend.py
@@ -1,3 +1,11 @@
+'''
+Demo of a scatter plot (scatter) with a legend.
+
+Also demonstrates how transparency of the markers
+can be adjusted by giving ``alpha`` a value between
+0 and 1.
+'''
+
 import matplotlib.pyplot as plt
 from numpy.random import rand
 
