Function cosine_similarity

pattern/vector/__init__.py:694–699

Returns the cosine similarity of the given vectors.

(v1, v2)

norm = l2 = L2 = L2norm = l2norm = L2_norm = l2_norm

def cosine_similarity(v1, v2):
    """ Returns the cosine similarity of the given vectors.
    """
    s = sum(v1.get(f, 0) * w for f, w in v2.iteritems())
    s = float(s) / (l2_norm(v1) * l2_norm(v2) or 1)
    return s
    
cos = cosine_similarity