twinData {OpenMx} | R Documentation |
Australian data on body mass index (BMI) which saved in the text file twinData.txt. It is a wide dataset, with two individuals per line. It also contains both MZ and DZ twins, along with heights, weights and the calculated variable body mass index (BMI) for each subject. Ago of course occurs only once, as the two twins of each pair share a common age. fam is a family identifier.
data(twinData)
A data frame with 3808 observations on the following 12 variables.
fam
a numeric vector
age
a numeric vector
zyg
a numeric vector
part
a numeric vector
wt1
a numeric vector
wt2
a numeric vector
ht1
a numeric vector
ht2
a numeric vector
htwt1
a numeric vector
htwt2
a numeric vector
bmi1
a numeric vector
bmi2
a numeric vector
Zygosity is coded as follows 1 == MZ females 2 == MZ males 3 == DZ females 4 == DZ males 5 == DZ opposite sex pairs
data(twinData) str(twinData) plot(wt1~wt2, data=twinData) mzData <- as.matrix(subset(myTwinData, zyg==1, c(bmi1,bmi2))) dzData <- as.matrix(subset(myTwinData, zyg==3, c(bmi1,bmi2)))