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

As @mplourde points out, you want the collapse argument:

paste(test_rev, collapse='')

Most commands in R are vectorized, but how exactly the command handles vectors depends on the command. paste will operate over multiple vectors, combining the ith element of each:

> paste(letters[1:5],letters[1:5])
[1] "a a" "b b" "c c" "d d" "e e"

collapse tells it to operate within a vector instead.