(Internal) function that checks if folds result from subsampling with p = 0.5 and adds complementary pairs if needed.
check_folds(folds, B, n, sampling.type)A matrix containing the folds, possibly after adding the
complementary pairs.
a weight matrix that represents the subsamples.
number of subsampling replicates.
the number of observations; needed for internal checks.
sampling type to be used.
This is an internal function used to check if folds are
specified correctly. For details (e.g. on arguments) see
stabsel.
B. Hofner, L. Boccuto and M. Goeker (2015), Controlling false
discoveries in high-dimensional situations: Boosting with stability
selection. BMC Bioinformatics, 16:144.
tools:::Rd_expr_doi("10.1186/s12859-015-0575-3").
For details see stabsel.