/Python/Argmax change dafault value for multiple maxima

Argmax change dafault value for multiple maxima

def my_argmax(a):
    rows = np.where(a == a.max(axis=1)[:, None])[0]
    rows_multiple_max = rows[:-1][rows[:-1] == rows[1:]]
    my_argmax = a.argmax(axis=1)
    my_argmax[rows_multiple_max] = -1
    return my_argmax

Source: stackoverflow.com

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