R: Function to generate descriptive summary tables for...

descriptives.trait {GenABEL} | R Documentation

## Function to generate descriptive summary tables for phenotypic data

### Description

Function to generate descriptive summary tables for phenotypic data

### Usage

    	descriptives.trait(data,subset,file,by.var=NULL,digits = 3)

### Arguments

`data` | an object of `snp.data-class` or `gwaa.data-class`
`subset` | Subset of people to run analysis on. If missing, all people from `data` are used for analysis.
`file` | A string specifying the name of a file to write the tables to (default is no file otput).
`by.var` | a binary variable or a character scalar specifying the name of a binary trait in data; statistics will be produced separately for the groups and compared
`digits` | number of digits to be printed

### Value

A table with descriptive statistics. Ptt: t-test; Pkw: kruskal.test; Pex: Fisher exact test (for factors with <5 levels)

### Author(s)

Yurii Aulchenko

### Examples

    	require(GenABEL.data)
    	data(srdta)
    	descriptives.trait(srdta)
    	descriptives.trait(srdta,by.var=srdta@phdata$sex)
    	descriptives.trait(srdta,by.var="sex")
    	attach(phdata(srdta))
    	descriptives.trait(srdta,by.var=sex)
    	detach(phdata(srdta))

[Package GenABEL version 1.8-0 Index]