Converting numeric vector to logical based on comparison with limit

Question

I have a numeric variable where values range from ~20 to ~40 and are continuous.

To samples falling below the cut-off (38) I would like to assign TRUE, and to all higher numbers FALSE. For example,

x = c(20, 40, 35, 40)

...should result in:

c(TRUE, FALSE, TRUE, FALSE)

Can anyone give me a suggestion for how to do this in R?

Answer 1

 samples <- c(20,40,20,40,38)
 dummyVar <- samples < 38