[R] PCA and categorical data

Hans Ekbrand hans.ekbrand at sociology.gu.se
Fri Mar 6 22:28:46 CET 2009


On Fri, Mar 06, 2009 at 09:46:17AM -0000, Ted Harding wrote:
> On 06-Mar-09 09:25:26, Prof Brian Ripley wrote:
> > You might want to look into correspondence analysis, which has several 
> > variants of PCA designed for categorical data.
> 
> In particular, have a look at the results of
> 
>   RSiteSearch("correspondence")

I can recommend the packages "ca" and "FactoMineR"

http://cran.r-project.org/web/packages/ca/index.html
http://cran.r-project.org/web/packages/FactoMineR/index.html

http://www.jstatsoft.org/v20/i03
http://www.jstatsoft.org/v25/i01

-- 
Hans Ekbrand (http://sociologi.cjb.net) <hans at sociologi.cjb.net>
GPG Fingerprint: 1408 C8D5 1E7D 4C9C C27E 014F 7C2C 872A 7050 614E
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