I guess this is probably a too simple question for most of you but my algebra skills are very limited (ashamed).
I have run two PCA analyses and conducted a Procrustes analyses to fit one matrix (first two components) onto the other matrix. As a result I obtain the transformed matrix but also: a rotation matrix, a translation vector and a scale factor.
How should I operate with these three elements (rotation, translation and scale) to translate the coordinates of a single point that is part of the matrix-to-be-transformed but was skipped from the Procrustes analyses? That point was excluded before the Procrustes analysis because I don't want it to have any influence on the fitting. (In case it helps, I am using the R package "vegan").
Many, many thanks, Federico