Part 1: Creating a gd_snp dataset from public data in pgSnp format
Overview:
Import allele frequency data in pgSnp format for several human populations from
the PSU Genome Browser ("BX table browser").
Add the reference alleles to each file.
Start building the gd_snp dataset by converting the first pgSnp file.
Add to the gdSnp dataset by converting the remaining pgSnp files.
Note: If your dataset is already in gd_snp format, you may want to skip this part
and go straight to Part 2. Or, you can use the steps
here to add data from the 1000 Genomes Project to your gd_snp dataset.