<p>I have got a BED file  (used in Plink and with .bim and .fam file) which contains Affy 500K data, I want to convert it back to PED file with map file. Is there anyone how to do this task? Thank you very much !</p>

    plink --bfile filename --recode --tab --out myfavpedfile

[plink](http://pngu.mgh.harvard.edu/~purcell/plink/dataman.shtml#recode)
