Generate a sequence of characters from 'A'-'Z'

Question

I can make a sequence of numbers like this:

s = seq(from=1, to=10, by=1) 

How do I make a sequence of characters from A-Z? This doesn't work:

seq(from=1, to=10) 

Answer 1

Use LETTERS and letters (for uppercase and lowercase respectively).

Answer 2

Use the code you have with letters and/or LETTERS:

> LETTERS[seq( from = 1, to = 10 )]  [1] "A" "B" "C" "D" "E" "F" "G" "H" "I" "J" > letters[seq( from = 1, to = 10 )]  [1] "a" "b" "c" "d" "e" "f" "g" "h" "i" "j"