Re: [R] Matrix of dummy variables from a factor

From: Liaw, Andy <andy_liaw_at_merck.com>
Date: Wed 07 Dec 2005 - 07:29:58 EST


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@polisci.wisc.edu
> chfrankl@wisc.edu
> 608-263-2022 (voice)
> 608-265-2663 (fax)
>
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R-help@stat.math.ethz.ch mailing list
https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html Received on Wed Dec 07 08:17:28 2005

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