number of individuals and markers.
Output files:
genotype.desc, genotype.bin: genotype file in bigmemory format
phenotype.phe: ordered phenotype file, same taxa order with genotype file
map.map: SNP information
Arguments
bfile
Genotype in binary format (.bed, .bim, .fam)
out
the name of output file
maxLine
the max number of line to write to big matrix for each loop