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# scikits.statsmodels.family.family.Poisson

class `scikits.statsmodels.family.family.``Poisson`(link=<scikits.statsmodels.family.links.Log object at 0x032FF130>)

  Poisson exponential family.

  Parameters: | link : a link instance, optional The default link for the Poisson family is the log link. Available links are log, identity, and sqrt. See statsmodels.family.links for more information.

  See also

  `statsmodels.family.family.Family`

  Attributes

  `link` | Helper method to get the link for a family.
  `variance` |

  valid (class attribute) | list | A list contained the domain for the Poisson family.

  Methods

  `resid_dev`(Y, mu[, scale]) | Gaussian deviance residual
  `deviance`(Y, mu[, scale]) | Poisson deviance function
  `loglike`(Y, mu[, scale]) | Loglikelihood function for Poisson exponential family distribution.
  `resid_anscombe`(Y, mu) | Anscombe residuals for the Poisson exponential family distribution

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