Bivariate twin data, wide-format from Classic Mx Manual
Data set used in some of OpenMx's examples.
data("example1")
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
Same as example2 but in wide format instead of tall.
Classic Mx Manual.
The OpenMx User's guide can be found at http://openmx.ssri.psu.edu/documentation.
data(example1) plot(X2 ~ X1, data = example1)
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