Method __init__

pattern/vector/__init__.py:1864–1870

Returns the matrix of classes x predicted classes as a dictionary.

(self, classify=lambda document: True, documents=[])

class ConfusionMatrix(defaultdict):
    
    def __init__(self, classify=lambda document: True, documents=[]):
        """ Returns the matrix of classes x predicted classes as a dictionary.
        """
        defaultdict.__init__(self, lambda: defaultdict(int))
        for document, type1 in documents:
            type2 = classify(document)
            self[type1][type2] += 1

    def split(self):
        """ Returns an iterator over one-vs-all (type, TP, TN, FP, FN)-tuples.