sd.bfile: Obtain the SNP-wise standard deviations from the PLINK bfile

In tshmak/lassosum: LASSO with summary statistics and a reference panel

Description

Obtain the SNP-wise standard deviations from the PLINK bfile

Usage

sd.bfile(bfile, keep = NULL, remove = NULL, extract = NULL,
  exclude = NULL, chr = NULL, trace = 0, ...)

Arguments

bfile	plink file stem
keep	samples to keep
remove	samples to remove
extract	SNPs to extract
exclude	SNPs to exclude
chr	a vector of chromosomes

Details

keep, remove could take one of three formats: (1) A logical vector indicating which indivduals to keep/remove, (2) A data.frame with two columns giving the FID and IID of the indivdiuals to keep/remove (matching those in the .fam file), or (3) a character scalar giving the text file with the FID/IID. Likewise extract, exclude can also take one of the three formats, except with the role of the FID/IID data.frame replaced with a character vector of SNP ids (matching those in the .bim file).

Note

Missing genotypes are interpreted as having the homozygous A2 alleles in the PLINK files (same as the --fill-missing-a2 option in PLINK).

tshmak/lassosum documentation built on Sept. 24, 2020, 9:41 a.m.