Description Usage Arguments Examples
This function allows you to add derived variable (ex: add mean value by ID).
1 |
dat |
data frame |
sort |
sort derived variable by (ex:c("ID","SEX")) |
var |
variable to be derived |
fun |
deriving funtion ex:c("mean(x)=mean","length(x[is.na(x)])") |
1 | addvar()
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