search for: tp4536162p4536189

Dear all, Suppose I have a dataset with two variables: X = c(0, 1, 2) Y = c(1, 1, 1) DS = data.frame(X, Y) Now, I want to create a new variable Z with 3 observations, but I want its values to be the result of a function. I want to create a function that compares X and Y, and if X = Y, then Z value = 3. If X value differs from Y value, Z value = 4. So, I'd have the following values for Z: 4,

I have data that looks like this: > df1 group id 1 red A 2 red B 3 red C 4 blue D 5 blue E 6 blue F I want a list of the groups containing vectors with the ids. I am avoiding subset(), as it is only recommended for interactive use. Here's what I have so far: df1 <- data.frame(group=c("red", "red", "red", "blue",