Email from Arno V
When conducting the multilevel PCA, it works on some parts of the data, but other parts give following error: 'Error in ph.new/drop(sqrt(crossprod(ph.new))) : non-conformable arrays'. When performing multilevel PLS-DA on the same data, it does not give an error, just a warning: 'In cor(Ak, variates.Ak) : the standard deviation is zero'. Is there a way to solve this error in PCA and is it related to the warning in PLS-DA? Thanks in advance!