Add exaple title to cohere_demo

dstansby · dstansby · commit a54d257286a3 · 2017-01-29T11:03:34.000Z
diff --git a/examples/pylab_examples/cohere_demo.py b/examples/pylab_examples/cohere_demo.py
@@ -1,5 +1,9 @@
 """
-Compute the coherence of two signals
+=====================================
+Plotting the coherence of two signals
+=====================================
+
+An example showing how to plot the coherence of two signals.
 """
 import numpy as np
 import matplotlib.pyplot as plt
