Bivariate twin data example 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.psyc.virginia.edu/documentation.

Examples

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