opls

A generic preprocessing method for multivariate data. It removes variation from X that is not correlated to Y.

(We usually don't use this function. We use a PLS_Toolbox from Eigenvector Research, Inc. instead)

References: Johan Trygg and Svante Wold, Orthogonal projections to latent structures (O-PLS), J. Chemometrics 2002; 16: 119-128