The function scales the specified component such that the average column
variance is equal to the user-specified proportion of variance.
Usage
rescaleVariance(component, propvar)
Arguments
component
[N x P] Phenotype matrix [double] where [N] are the number
of samples and P the number of phenotypes
propvar
Number [double] specifying the proportion of variance that
should be explained by this phenotype component
Value
If propvar != 0, a named list with the [N x P] matrix of the scaled
component (component) and its scale factor [double] (scale_factor) else
returns NULL