Merge pull request #1233 from pymc-devs/categorical_docstring

Corrected Categorical docstring to specify array argument for parameter

Author: twiecki

pymc3/distributions/discrete.py

@@ -357,7 +357,7 @@ class Categorical(Discrete):
 
     Parameters
     ----------
-    p : float
+    p : array of floats
         p > 0 and the elements of p must sum to 1. They will be automatically
         rescaled otherwise.
     """