कोडिंग कार्यप्रवाह · वर्गीकरण के भ्रम मैट्रिक्स

def confusion(expected, predicted, labels):
    if len(expected) != len(predicted) or len(set(labels)) != len(labels):
        raise ValueError("labels or lengths")
    index = {label: i for i, label in enumerate(labels)}
    matrix = [[0] * len(labels) for _ in labels]
    for actual, guess in zip(expected, predicted):
        if actual not in index or guess not in index:
            raise ValueError("unknown label")
        matrix[index[actual]][index[guess]] += 1
    return matrix