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same

Test if two numpy arrays are the same

    Parameters
    ----------
    a : pdl
    b : pdl

reldiff Calculate the relative difference between two input arrays

    Calculated by :math:`\\frac{|a-b|_1}{|a|_1 + |b|_1}`

    Parameters
    ----------
    a : pdl
    b : pdl

almost_equal

Test if two pdl arrays are almost equal.