Hi All, I have a quick question regarding Principal component. I ran principal components on two data sets cases and controls. I am interested in knowing if there is a significant difference between the cases and the controls, I was wondering if there is a test that test if there is a significant difference between the Principal components of the cases and the controls? I appreciate your help -- View this message in context: http://n4.nabble.com/Principal-component-tp974949p974949.html Sent from the R help mailing list archive at Nabble.com.