An embedded and charset-unspecified text was scrubbed... Name: not available Url: https://stat.ethz.ch/pipermail/r-help/attachments/20050425/b3e58a8b/attachment.pl
Pca loading plot lables
3 messages · Frédéric Ooms, Jari Oksanen, Bjørn-Helge Mevik
On Mon, 2005-04-25 at 13:21 +0200, Fr??d??ric Ooms wrote:
Dear colleagues,
I a m a beginner with R and I would like to add labels (i.e. the variable names) on a pca loading plot to determine the most relevant variables. Could you please tell me the way to do this kind of stuff.
The command I use to draw the pca loading plot is the following :
Plot(molprop.pc$loading[,1] ~ molprop.pc$loading[,2])
Thanks for your help
Have you tried 'biplot' and found it unsatisfactory for your needs? biplot(pr) Alternatively, you can do it by hand: plot(pr$loadings, type="n") text(pr$loadings, rownames(pr$loadings), xpd=TRUE) abline(h=0); abline(v=0) If you really want to have Axis 2 as horizontal, then you must replace all pr$loadings pieces with pr$loadings[,2:1]. cheers, jari oksanen
Jari Oksanen <jarioksa at sun3.oulu.fi>
One way is to use the loadingplot() function in the package `pls': molprop.pc <- princomp(whatever) library(pls) loadingplot(molprop.pc, scatter = TRUE, labels = "names") (If you want comp 2 vs. comp 1: loadingplot(molprop.pc, comps = 2:1, scatter = TRUE, labels = "names")
Bj??rn-Helge Mevik