Table.N.Per {SNPassoc}

Descriptive sample size and percentage

Description

This function computes sample size and percentage for each category of a categorical trait (e.g. case-control status) for each genotype (or combination of genotypes).

Usage

Table.N.Per(var, dep, subset = !is.na(var))

Arguments

var

categorical trait.

dep

variable with genotypes or any combination of them

subset

an optional vector specifying a subset of observations to be used in the descriptive analysis.

Value

tp

A matrix giving sample size (n),and the percentage (%) for each level of the categorical trait for each genotype

See Also

Table.mean.se

Examples

data(SNPs)
#sample size and percentage of cases and controls for each genotype 
Table.N.Per(SNPs$snp10001,SNPs$casco)

# The same table for a subset (males)
Table.N.Per(SNPs$snp10001,SNPs$casco,SNPs$sex=="Male")

# The same table assuming a dominant model
Table.N.Per(dominant(snp(SNPs$snp10001,sep="")),SNPs$casco,SNPs$sex=="Male")