Method sign

lib/matplotlib/axes/_axes.py:2865–2866

(x)

        # want to know whether to put label on positive or negative direction
        # cannot use np.sign here because it will return 0 if x == 0
        def sign(x):
            return 1 if x >= 0 else -1

        _api.check_in_list(['edge', 'center'], label_type=label_type)