while (<$in_file>) {
    print "$_";
    chomp;
    my @snp_bins;
    if (/^SAMPLE/) {
        my ( $placeholder, @coords ) = split /,/;
        foreach my $coord (@coords) {
            push @snp_bins, int( $coord / 100_000 );
        }
    }
    else {
        my ( $id, @snps ) = split /,/;
        push @individuals, $id;
        foreach my $individual (@individuals) {
            print "working on $individual\n";
            foreach my $snp (@snps) {
                my $snp_bin = shift @snp_bins;
                print "snp_bin $snp_bin\n";
                $data{$individual}[ [ $snp_bin ] ] = $snp;
            }

        }
        print "snp_bins: @snp_bins\n";
    }
}