optim.GCCA(matrixpls.res, innerEstimator, ...)matrixpls from which the
criterion function is calculatednull will use identity matrix as inner estimates and causes the algorithm to converge
after the first iteration. This is useful when using
outerEstimators and innerEstimator.optim.GSCA;
optim.maximizeInnerR2;
optim.maximizePrediction