| twin_NA_dot {OpenMx} | R Documentation |
Data set used in some of OpenMx's examples.
data("twin_NA_dot")
A data frame with 3808 observations on the following variables.
famFamily ID variable
ageAge of the twin pair. Range: 17 to 88.
zygInteger codes for zygosity and gender combinations
partwt1Weight in kilograms for twin 1
wt2Weight in kilograms for twin 2
ht1Height in meters for twin 1
ht2Height in meters for twin 2
htwt1Product of ht and wt for twin 1
htwt2Product of ht and wt for twin 2
bmi1Body Mass Index for twin 1
bmi2Body Mass Index for twin 2
Same as myTwinData but has . as the missing data value instead of NA.
Timothy Bates
The OpenMx User's guide can be found at http://openmx.psyc.virginia.edu/documentation.
data(twin_NA_dot) summary(twin_NA_dot) # Note that all variables are treated as factors because of the missing data coding.