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# scikits.statsmodels.family.family.NegativeBinomial.starting_mu

`NegativeBinomial.``starting_mu`(y)

  Starting value for mu in the IRLS algorithm.

  Parameters: | y : array The untransformed response variable.
  Returns: | mu_0 : array The first guess on the transformed response variable.

  Notes

  Only the Binomial family takes a different initial value.

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