class statsmodels.genmod.families.links.NegativeBinomial(alpha=1.0) [source]
The negative binomial link function
| Parameters: | alpha (float, optional) – Alpha is the ancillary parameter of the Negative Binomial link function. It is assumed to be nonstochastic. The default value is 1. Permissible values are usually assumed to be in (.01, 2). |
|---|
deriv(p) | Derivative of the negative binomial transform |
deriv2(p) | Second derivative of the negative binomial link function. |
inverse(z) | Inverse of the negative binomial transform |
inverse_deriv(z) | Derivative of the inverse of the negative binomial transform |
© 2009–2012 Statsmodels Developers
© 2006–2008 Scipy Developers
© 2006 Jonathan E. Taylor
Licensed under the 3-clause BSD License.
http://www.statsmodels.org/stable/generated/statsmodels.genmod.families.links.NegativeBinomial.html