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

example2 {OpenMx} | R Documentation

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

### Description

Data set used in some of OpenMx's examples.

### Usage

    data("example2")

### Format

A data frame with 800 observations on the following variables.

`IDNum`

  ID number

`TwinNum`

  Twin ID number

`Zygosity`

  Zygosity of the twin

`X`

  X variable for twins 1 and 2

`Y`

  Y variable for twins 1 and 2

### Details

Same as example1 but in tall format instead of wide.

### Source

Classic Mx Manual.

### References

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

### Examples

    data(example2)
    plot(Y ~ X, data = example2)

[Package OpenMx version 2.17.3 Index]