[R] PCA biplot question

Tyler Smith tyler.smith at mail.mcgill.ca
Thu Apr 20 23:56:57 CEST 2006

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:




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