statsmodels.genmod.families.family.InverseGaussian.resid_dev¶

InverseGaussian.resid_dev(endog, mu, scale=1.0)[source]¶

Returns the deviance residuals for the inverse Gaussian family.

Parameters:

endog : array-like

Endogenous response variable

mu : array-like

Fitted mean response variable

freq_weights : array-like

1d array of frequency weights. The default is 1.

scale : float, optional

An optional argument to divide the residuals by scale. The default is 1.

Returns:

resid_dev : array

Deviance residuals as defined below

Notes

$resid\_dev_i = sign(Y_i - \mu_i) * \sqrt {(Y_i - \mu_i)^2 / (Y_i * \mu_i^2)} / scale$