[Rd] How do I know if the deviance of a glm fit was fixed?

Duncan Murdoch murdoch@stats.uwo.ca
Fri, 18 Jan 2002 12:51:58 -0500

On Fri, 18 Jan 2002 17:26:01 +0000 (GMT), you wrote in message

>On Fri, 18 Jan 2002, Duncan Murdoch wrote:
>> I'm writing functions that need to behave differently for
>> GLMs like binomial and Poisson with fixed deviance, and those like
>> normal or gamma or quasi where the deviance is estimated from the
>> data.  Given a glm object, is there a simple way to tell this
>> directly, or do I have to look at the name of the family?
>Did you mean dispersion fixed?

Yes, that's what I meant.  Thanks to everyone for the quick responses!

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