R: Twin data from a nuclear family design

nuclear_twin_design_data {OpenMx} | R Documentation

## Twin data from a nuclear family design

### Description

Data set used in some of OpenMx's examples.

### Usage

    data("nuclear_twin_design_data")

### Format

A data frame with 1743 observations on the following variables.

`Twin1`
`Twin2`
`Father`
`Mother`
`zyg`

  Zygosity of the twin pair

### Details

This is a wide format data set. A single variable has values for different member of the same nuclear family.

### Source

Likely simulated.

### References

The OpenMx User's guide can be found at https://openmx.ssri.psu.edu/documentation/.

### Examples

    data(nuclear_twin_design_data)

    cor(nuclear_twin_design_data[,-5], use="pairwise.complete.obs")

[Package OpenMx version 2.20.6 Index]