Hello everybody,

I got a little question. I have to submit my R-script until Monday and I'm struggling with one task.

I have a Dataframe called my.matrix

my.matrix <- cbind(id, sex, weight, height)

The task is as follows: "Calculate the mean of weight of all participants with an odd id"

Is there a function to calculate the mean of weight of all participants with an odd id with the basic r studio functions?

Thank you in advance