Function relative

pattern/vector/__init__.py:674–681

Returns the vector with feature weights normalized so that their sum is 1.0 (in-place).

(v)

_features = features

def relative(v):
    """ Returns the vector with feature weights normalized so that their sum is 1.0 (in-place).
    """
    n = float(sum(v.itervalues())) or 1.0
    s = dict.__setitem__
    for f in v: # Modified in-place.
        s(v, f, v[f] / n)
    return v
    
rel = relative