1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
|
\name{myTwinData}
\alias{myTwinData}
\docType{data}
\title{
Duplicate of twinData
}
\description{
Legacy dataset from early teaching examples. See \code{\link{twinData}} for a more current file.
}
\usage{data("myTwinData")}
\format{
A data frame with 3808 observations on the following variables.
\describe{
\item{\code{fam}}{Family ID variable}
\item{\code{age}}{Age of the twin pair. Range: 17 to 88.}
\item{\code{zyg}}{Integer codes for zygosity and gender combinations}
\item{\code{part}}{Cohort}
\item{\code{wt1}}{Weight in kilograms for twin 1}
\item{\code{wt2}}{Weight in kilograms for twin 2}
\item{\code{ht1}}{Height in meters for twin 1}
\item{\code{ht2}}{Height in meters for twin 2}
\item{\code{htwt1}}{Product of ht and wt for twin 1}
\item{\code{htwt2}}{Product of ht and wt for twin 2}
\item{\code{bmi1}}{Body Mass Index for twin 1}
\item{\code{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 \url{https://openmx.ssri.psu.edu/documentation/}.
}
\examples{
data(myTwinData)
plot( ht1 ~ wt1, myTwinData)
}
\keyword{datasets}
|
