statsmodels.genmod.families.links.nbinom

class statsmodels.genmod.families.links.nbinom(alpha=1.0) [source]

The negative binomial link function.

Notes

g(p) = log(p/(p + 1/alpha))

nbinom is an alias of NegativeBinomial. nbinom = NegativeBinomial(alpha=1.)

Methods

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.nbinom.html