R: Duplicate of twinData

myTwinData {OpenMx} | R Documentation

## Duplicate of twinData

### Description

Legacy dataset from early teaching examples. See `twinData` for a more current file.

### Usage

    data("myTwinData")

### Format

A data frame with 3808 observations on the following variables.

`fam`

  Family ID variable

`age`

  Age of the twin pair. Range: 17 to 88.

`zyg`

  Integer codes for zygosity and gender combinations

`part`

  Cohort

`wt1`

  Weight in kilograms for twin 1

`wt2`

  Weight in kilograms for twin 2

`ht1`

  Height in meters for twin 1

`ht2`

  Height in meters for twin 2

`htwt1`

  Product of ht and wt for twin 1

`htwt2`

  Product of ht and wt for twin 2

`bmi1`

  Body Mass Index for twin 1

`bmi2`

  Body Mass Index for twin 2

### Details

Height and weight are highly correlated, and each individually highly heritable. These data present and opportunity for multivariate behavior genetics modeling.

### Source

Timothy Bates

### References

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

### Examples

    data(myTwinData)

    plot( ht1 ~ wt1, myTwinData)

[Package OpenMx version 2.17.3 Index]