Apply 'rotatefactors' on the observations to represent them in the new factorial design (PCA)

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Water_RC
Water_RC 2018-2-15
Hi all,
I guess, that it is an easy issue, but I can not figure out how to apply rotatefactors on the SCORES matrix resulting from a previous PCA:
(1) I run a PCA following:
[wcoeff,score] = pca(zscore(DataSet))
(2) I would like to rotate my principal components using rotatefactors:
[NewCoeff,TransfMatrix] = rotatefactors(wcoeff);
NewCoeff should give the new coordinates of the variables on the varimax-rotated components.
My question is: How can I compute the coordinates 'NewScores' of my observations on the new components? My idea is to plot them on a biplot and on an other scatter-plot where each axis is a component. I guess that there is something easy like:
NewScores = score * TransfMatrix
Am I right?
Romain

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