Loads variant positions, IDs, and allele codes from a .pvar or .bim file (which can be compressed with gzip or Zstd).
NewPvar(filename, omit_chrom = FALSE, omit_pos = FALSE)
A pvar object, which can be queried for variant IDs and allele codes.
.pvar/.bim file path.
Whether to skip CHROM column.
Whether to skip POS column.