PCA and categorical data
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 -------------- next part -------------- A non-text attachment was scrubbed... Name: not available Type: application/pgp-signature Size: 197 bytes Desc: Digital signature URL: <https://stat.ethz.ch/pipermail/r-help/attachments/20090306/19b055ea/attachment-0003.bin>