How to generate plink map files

Question

[davidenoma]

I have .ped, .bed, .fam and .bam plink files. Please how can I generate the plink .map file?

[chrchang523]

It is worth clarifying why you need to generate the .map file, since >95% of the time it's a bad idea: the .ped + .map format is simultaneously MUCH less efficient and, on top of that, even tends to lose some information that .bed + .bim + .fam can store.

Answer 1

[davidenoma]

Recoding the bed file can create a map file with the ped file

plink --bfile filename --recode --tab --out outfille