chisq_colpairs {qtl2}

Chi-square test on all pairs of columns

Description

Perform a chi-square test for independence for all pairs of columns of a matrix.

Usage

chisq_colpairs(x)

Arguments

x

A matrix of positive integers. NAs and values <= 0 are treated as missing.

Value

A matrix of size p x p, where p is the number of columns in the input matrix x, containing the chi-square test statistics for independence, applied to pairs of columns of x. The diagonal of the result will be all NAs.

Examples

z <- matrix(sample(1:2, 500, replace=TRUE), ncol=5)
chisq_colpairs(z)