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Hello, I am a new user of R and I am trying to use the data I am reading from a spreadsheet. I installed the xlsReadWrite package and I am able to read data from this files, but how can I assign the colums into values? E.g: as I read a spreadsheet like this one: A B 1 2 4 9 I manually assign the values: A<-c(1,4) B<-c(2,9) to plot it on a graph: plot(A,B) or make histograms: hist(A) But

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",