DReichLab / DReichLab/EIG

.snp file format

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Description

I wanna to understand if the v54.1_1240K_public.snp file column in Eigenstrat format represents "SNP ID","Chromosome","Position in centimorgans","Base-pair coordinate","ALT allele","REF allele"? or the last two column mean "REF allele" and "ALT allele"?
head(file):
rs3094315 1 0.020130 752566 G A
rs12124819 1 0.020242 776546 A G
rs28765502 1 0.022137 832918 T C
rs7419119 1 0.022518 842013 T G
rs950122 1 0.022720 846864 G C

File link :https://reichdata.hms.harvard.edu/pub/datasets/amh_repo/curated_releases/V54/V54.1/SHARE/public.dir/v54.1_1240K_public.snp

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Research direction

Start with the linked v54.1_1240K_public.snp file and its six-column examples, then compare them with the Eigenstrat format used by this repository. Done when the column order, including the REF/ALT interpretation, is explicitly confirmed in the issue or project documentation.

Written by the indexing model from the issue text.

Assessment

Domain
data
Issue type
Documentation
Difficulty
2/5
Estimated time
1-3 hours
Activity status
Stale
Clarity
Needs clarification
Newbie friendliness
30/100

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