[R] rstandard does not produce standardized residuals

[Prof Brian D Ripley]

This has laready been changed in the R-devel version (1.9.0 to be).
Pre-test versions of that for Windows are available on CRAN.

>From the NEWS file


    o	rstandard() was wrongly scaled for cases where
	summary(model)$dispersion != 1.

and that ought to mention glm somewhere ....


On Tue, 24 Feb 2004, Ulrich Halekoh wrote:

> Dear all,
>
>
> the application of the function rstandard() in the base package
>  to a glm object does not produce  residuals standardized to
> have variance one:
>
> the reason is that the deviance residuals are  divided
> by the dispersion estimate and not by the
> square root of the estimate for the dispersion.
>
> Should the function not be changed to produce residuals
> with a variance about 1?
>
>
> R 1.8.1 on windows 2000
>
> ulrich
>
>
> ==============================================================
> Ulrich Halekoh,  PhD                         Phone: +45 8999 1825
> Biometry Research Unit                       Fax:   +45 8999 1300
> Danish Institute of Agricultural Sciences    E-mail: ulrich.halekoh at agrsci.dk
> Research Centre Foulum, DK-8830 Tjele, Denmark
>
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>

-- 
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)
1 South Parks Road,                     +44 1865 272860 (secr)
Oxford OX1 3TG, UK                Fax:  +44 1865 272595