Appends an unphased biallelic hardcall variant to a .pgen being written.
AppendBiallelic(pgen_writer, geno)No return value, called for side-effect.
Object returned by NewPgenWriter().
Integer or numeric vector of length sample_ct, with values in {0, 1, 2, NA} indicating the number of ALT allele copies; -9 is also accepted as a missing-value code. (A buffer filled by ReadHardcalls() is in this format.)