R/subset_funcs.R
ppp.RdSelects biomolecules for normalization via the method of percentage of the peptides (or proteins, metabolites, etc.) present (PPP)
ppp(e_data, edata_id, proportion = 0.5)a \(p \times n + 1\) data.frame, where \(p\) is the number of peptides, proteins, lipids, or metabolites and \(n\) is the number of samples. Each row corresponds to data for a peptide, protein, lipid, or metabolite, with one column giving the biomolecule identifier name.
character string indicating the name of the peptide, protein,
lipid, or metabolite identifier. Usually obtained by calling
attr(omicsData, "cnames")$edata_cname.
numeric value between 0 and 1, indicating the proportion at or above which a biomolecule must be present across all samples in order to be retained (default value 0.5)
Character vector containing the biomolecules belonging to the PPP subset.
Biomolecules present across proportion samples are designated as
PPP.