From murdoch@stats.uwo.ca  Fri Jan 18 17:51:58 2002
From: murdoch@stats.uwo.ca (Duncan Murdoch)
Date: Fri, 18 Jan 2002 12:51:58 -0500
Subject: [Rd] How do I know if the deviance of a glm fit was fixed?
In-Reply-To: <Pine.LNX.4.31.0201181723560.25655-100000@gannet.stats>
References: <ldlg4u4kjhdff9g4j1ii2e3ri418t9pgsq@4ax.com> <Pine.LNX.4.31.0201181723560.25655-100000@gannet.stats>
Message-ID: <g4og4ucbg9h2jj67ggkuorlnbficrp4vc9@4ax.com>

On Fri, 18 Jan 2002 17:26:01 +0000 (GMT), you wrote in message
<Pine.LNX.4.31.0201181723560.25655-100000@gannet.stats>:

>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!

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