public BedBimFamReader(File bed, File bim, File fam) throws Exception
{
bedfd = new BedFileDriver(bed);
bimfd = new BimFileDriver(bim);
famfd = new FamFileDriver(fam);
nrOfIndividuals = famfd.getNrOfElements();
nrOfSnps = bimfd.getNrOfElements();
nrOfGenotypes = nrOfIndividuals * nrOfSnps;
paddingPerSnp = (int) ((bedfd.getNrOfElements() - nrOfGenotypes) / nrOfSnps);