Dear H Z,
Take a look at the examples in

require(MASS)
?glm.nb

This might be useful as well

summary(glm.nb(yourvariable ~ 1, data = yourdata))

HTH,

Jorge


On Fri, May 15, 2009 at 7:26 AM, H Z <zamani_h55@yahoo.com> wrote:

> Dear all
> please ,I need to write a function in R to estimate the parameters of
> negative binomial distribution and then calculate the loglikelihood amount
> for given data.Is there any one to help me.
> thank you very much for any help
> Best regards
>
>
>
>
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