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    statsmodels.genmod.families.links.cauchy.inverse_deriv2¶

    cauchy.inverse_deriv2(z)[source]¶

    Second derivative of the inverse link function g^(-1)(z).

    Parameters:
    zarray_like

    z is usually the linear predictor for a GLM or GEE model.

    Returns:
    g^(-1)’’(z)ndarray

    The value of the second derivative of the inverse of the link function

    Notes

    This method should be overwritten by subclasses.

    The inherited method is implemented through numerical differentiation.

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