y.loadings is used to extract a summary of the y-loadings from a PLS or PCA model.
If comps is missing (or is NULL), summaries for all regression estimates are returned. Otherwise, if comps is provided the requested component comps are returned.
For mvdareg objects only, boostrap summaries provided are for actual regression y.loadings, bootstrap percentiles, bootstrap mean, skewness, and bias. These summaries can also be extracted using y.loadings.boots