Function that extracts each unique character in a string

Question

Let\'s say that I have a string \"rrkn\". Is there a function in R that\'ll return a vector \"r\", \"k\", \"n\" (i.e. eac

Answer 1

If you want to make it slightly less cumbersome to type:

uniqchars <- function(x) unique(strsplit(x, "")[[1]]) 

Answer 2

Another solution to use rawToChar(unique(charToRaw(x))).