Hello. I used PCA in my text mining problem. I am writing the report and my adviser tells me that I need to report the following: kind of rotation (e.g. varimax) and the results of the kaiser-meyer-olkin (kmo) test and bartlett's test of sphericity. In previous posts, I saw that the PCA in rapidminer does not do rotations. May I know in general how is PCA computed in rapidminer? Hoping for a quick response. Thank you.