chi2:
Creates a vector of chi-squared values from the allelic test of association
Description
One degree of freedom Chi-squared test of allelic counts
Usage
chi2(Xa, Y)
Arguments
Xa
A matrix of genotype values coded as 0, 1 or 2 for homozygous major,
heterozygous, or homozygous minor, respectively. Rows are subjects and
columns are SNPs. May be created with method as.double.snp.data from the GenABEL
package.
Y
A vector of disease phenotypes, diseased = 1, non-diseased = 0
Value
This function returns a vector of chi-squared, one degree of freedom,
statistics for the allelic test of association. The length of this
vector is the number of SNPs.