statsmodels.genmod.families.family.Poisson.resid_dev¶
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Poisson.
resid_dev
(endog, mu, scale=1.0)[source]¶ Poisson deviance residual
Parameters: endog : array-like
Endogenous response variable
mu : array-like
Fitted mean response variable
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
\[resid\_dev_i = sign(Y_i - \mu_i) * \sqrt{2 * (Y_i * \log(Y_i / \mu_i) - (Y_i - \mu_i))} / scale\]