covsel_mlr — variable selection using covsel, then multiple linear regression (MLR)
dimension_tune — 8 criteria to tune the dimension of a PLSR or PCR, obtained on the predictions (RMSECV), on the b-coefficients (b-norm, Durbin-Watson, morphological factor and Gini), and on the deflated X-matrices (KMO-Kaiser-Meyer-Olkin, VIF-Variance Inflation Factor and Durbin-Watson)
ikpls — partial least squares regression computed with the improved-kernel algorithm