R: Bivariate twin data, wide-format from Classic Mx Manual

example1 {OpenMx} | R Documentation

## Bivariate twin data, wide-format from Classic Mx Manual

### Description

Data set used in some of OpenMx's examples.

### Usage

    data("example1")

### Format

A data frame with 400 observations on the following variables.

`IDNum`

  Twin pair ID

`Zygosity`

  Zygosity of the twin pair

`X1`

  X variable for twin 1

`Y1`

  Y variable for twin 1

`X2`

  X variable for twin 2

`Y2`

  Y variable for twin 2

### Details

Same as example2 but in wide format instead of tall.

### Source

Classic Mx Manual.

### References

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

### Examples

    data(example1)
    plot(X2 ~ X1, data = example1)

[Package OpenMx version 2.18.1 Index]