I think you're asking how to plot arrows for variables in one dataset onto the PCA plot for another dataset? You can do this with functions from the vegan package. Particularly, vector and factor fitting can be done with envfit() and surface fitting with ordisurf().
There's a good tutorial at: http://cc.oulu.fi/~jarioksa/softhelp/vegan.html Cheers, Tyler ______________________________________________ [email protected] mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
