[R] Extracting the dispersion parameter

ripley@stats.ox.ac.uk
Sun, 23 Feb 2003 10:33:03 -0000

On Sun, 23 Feb 2003, Edward F. Connor wrote:

> I have been unsuccessful in extracting the dispersion parameter in SPLUS
> 6.1 using
>
> summary or summary.glm(modelobj$dispersion)
>
> from a glm object in which the family was set to quasi. This is the syntax
> given in the manual.

What is `the manual'?  If this is an accurate transcription then `the
manual' is incorrect.

> I want to write a script to bootstrap the estimate of
> the dispersion parameter, but cannot seem to access that value.
>
> Any suggestions?

Ask on S-news about S-PLUS questions!  You may have meant

summary(glmobject)$dispersion

but as glm is one area where S-PLUS and R differ considerably it does help
to ask in the correct forum.

--
Brian D. Ripley,                  ripley at stats.ox.ac.uk
Professor of Applied Statistics,  http://www.stats.ox.ac.uk/~ripley/
University of Oxford,             Tel:  +44 1865 272861 (self)
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