families {snpStats} | R Documentation

## Test data for family association tests

### Description

These data started life as real data derived from an affected sibling pair study of type 1 diabetes. However, original subject and SNP identidiers have been replaced by randomly chosen ones.

### Usage

    data(families)

### Format

There are two objects in the loaded data file:

- `genotypes`: An object of class `"snp.matrix"` containing the SNP genotype data for both parents and affected offspring

- `pedData`: A data frame containing the standard six fields for a LINKAGE pedfile. The are named `familyid`, `member`, `father`, `mother` `sex`, and `affected`

The two objects are linked by common row names.

### Details

Coding in the `pedData` frame is as in the LINKAGE package, except that missing data are coded `NA` rather than zero

### Examples

    data(families)
    summary(genotypes)
    summary(pedData)

[Package snpStats version 1.44.0 Index]