Message-ID: <39B6DDB9048D0F4DAD42CB26AAFF0AFAFED638@usctmx1106.merck.com>
Date: 2005-12-06T20:29:58Z
From: Liaw, Andy
Subject: Matrix of dummy variables from a factor
See ?model.matrix.
HTH,
Andy
From: Charles H. Franklin
>
> What is a simple way to convert a factor into a matrix of
> dummy variables?
>
> fm<-lm(y~f)
>
> where f is a factor takes care of this in the estimation. I'd like to
> save the result of expanding f into a matrix for later use.
>
> Thanks.
>
> Charles
>
> --
>
>
> Charles H. Franklin
> Professor, Political Science
> University of Wisconsin, Madison
> franklin at polisci.wisc.edu
> chfrankl at wisc.edu
> 608-263-2022 (voice)
> 608-265-2663 (fax)
>
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