R: Descriptive sample size and percentage

Table.N.Per {SNPassoc} | R Documentation

## 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 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")

[Package SNPassoc version 1.9-2 Index]