sampleNByTotalAndFracB.numeric: Normalize total copy numbers by samples (total,fracB)
Description
Normalize total copy numbers by samples (total,fracB), where total is the total (non-polymorphic) signal and
fracB is the allele B fraction.
It is only loci with a non-missing (NA) fracB value that are
considered to be SNPs and normalized by NSA. The other loci
are left untouched.