The number of CV segments used in one replication.
numThreads
The maximum number of threads the algorithm is allowed to spawn (a value less than 1 or NULL means no threads).
maxNComp
The maximum number of components to consider in the PLS model.
sdfact
The factor to scale the stand. dev. of the MSEP values when selecting the optimal number
of components. For the "one standard error rule", sdfact is 1.