*It calculates the maximum residual error.
*It's best value is 0.
*y_true - 1d array like structure(set of true values)
*y_pred - 1d array like structure(set of predicted values by the classifier)
*Returns a positive floating point value i.e. max error.
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from sklearn.metrics import max_error
y_true = [3, 2, 7, 1]
y_pred = [9, 2, 7, 1]
max_error(y_true, y_pred)
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