getSelectedComponents: Get selected components
Description
returns number of components depending on a user choice
Usage
getSelectedComponents(obj, ncomp = NULL)
Arguments
obj
an MDA model or result object (e.g. pca, pls, simca, etc)
ncomp
number of components to select, provided by user
Details
Depedning on a user choice it returns optimal number of component for the model (if
use did not provide any value) or check the user choice for correctness and returns
it back