How to Reverse a string in R

Question

I\'m trying to teach myself R and in doing some sample problems I came across the need to reverse a string.

Here\'s what I\'ve tried so far but the paste operation d

Answer 1

##function to reverse the given word or sentence

reverse <- function(mystring){ 
n <- nchar(mystring)
revstring <- rep(NA, n)
b <- n:1
c <- rev(b)
for (i in 1:n) {
revstring[i] <- substr(mystring,c[(n+1)- i], b[i])
 }
newrevstring <- paste(revstring, sep = "", collapse = "")
return (cat("your string =", mystring, "\n",
("reverse letters = "), revstring, "\n", 
"reverse string =", newrevstring,"\n"))
}