maf {wtest}

Minor Allele Frequency

Description

Calculate minor allele frequency.

Usage

maf(data, which.snp = NULL)

Arguments

data

a data frame or matrix containing genotypes in the columns. Genotypes should be coded as (0, 1, 2) or (0, 1).

which.snp

a numeric value, indicating which SNP to calculate. When which.snp = NULL, MAF of all the markers is calculated. Default is NULL.

Value

The MAF of one marker.

Examples

data(diabetes.geno)
result <- maf(diabetes.geno, which.snp=10)