Compressed storage for SNP data
15 Stars
Updated Last
11 Months Ago
Started In
May 2016


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Routines for reading and manipulating compressed storage of biallelic SNP (Single-Nucleotide Polymorphism) data.

Data from genome-wide association studies (GWAS) are often saved as a PLINK binary biallelic genotype table or .bed file. To be useful, such files should be accompanied by a .fam file, containing metadata on the rows of the table, and a .bim file, containing metadata on the columns. The .fam and .bim files are in tab-separated format.


This package requires Julia v0.7 or later, which can be obtained from or by building Julia from the sources in the repository.

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If you use OpenMendel analysis packages in your research, please cite the following reference in the resulting publications:

OPENMENDEL: a cooperative programming project for statistical genetics. Zhou H, Sinsheimer JS, Bates DM, Chu BB, German CA, Ji SS, Keys KL, Kim J, Ko S, Mosher GD, Papp JC, Sobel EM, Zhai J, Zhou JJ, Lange K. Hum Genet. 2019 Mar 26. doi: 10.1007/s00439-019-02001-z. [Epub ahead of print] PMID: 30915546


Current implementation incorporates ideas in the package BEDFiles.jl by Doug Bates (@dmbates).

This project is supported by the National Institutes of Health under NIGMS awards R01GM053275 and R25GM103774 and NHGRI award R01HG006139.