ID Chrom Pos 0 0 0 0 1 1 1 1
snp1 chr1 1000 2 1 2 1 1 1 0 1
snp2 chr23 1000 2 1 2 1 0 1 1 2
snp3 chr24 1000 2 1 2 1 2 1 0 1
snp4 chr23 1000 2 1 2 1 1 1 1 2
snp5 chr25 1000 2 1 2 1 1 1 2 1
snp6 chr20 551234 1 2 2 0 1 2 0 0
snp8 chr20 567890 1 1 2 2 1 0 2 2
snp10 chr10 987456 2 1 1 1 1 1 1 1
snp11 chr10 5672341 1 0 1 1 1 0 2 0