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statsmodels.genmod.families.links.inverse_power.inverse_deriv2¶

inverse_power.inverse_deriv2(z)¶

Second derivative of the inverse of the power transform

Parameters:

z : array_like

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

Returns:

g^(-1)’(z) : ndarray

The value of the derivative of the inverse of the power transform

function

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