Tweedie.deviance()
statsmodels.genmod.families.family.Tweedie.deviance
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Tweedie.deviance(endog, mu, freq_weights=1.0, scale=1.0)
[source] -
Returns the value of the deviance function.
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 scale argument. The default is 1.
Returns: deviance : float
Deviance function as defined below
Notes
When ,
when and
otherwise.
When ,
For all other p,
Once is calculated, then calculate deviance as
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© 2006–2008 Scipy Developers
© 2006 Jonathan E. Taylor
Licensed under the 3-clause BSD License.
http://www.statsmodels.org/stable/generated/statsmodels.genmod.families.family.Tweedie.deviance.html