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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
inverse(z) Inverse of the negative binomial transform
inverse_deriv(z) Derivative of the inverse of the negative binomial transform

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© Copyright 2009-2013, Josef Perktold, Skipper Seabold, Jonathan Taylor, statsmodels-developers. Created using Sphinx 1.3.1.