[R] substr gives empty output

Ek Esawi esawiek at gmail.com
Sun Jan 21 16:50:31 CET 2018

The reason you get "" is, as stated on the previous response and on
the documentation of substr function, the function "When extracting,
if start is larger than the string length then "" is returned.". This
is what happens on your function.



On Sun, Jan 21, 2018 at 3:59 AM, Luigi Marongiu
<marongiu.luigi at gmail.com> wrote:
> Dear all,
> I have a string, let's say "testing", and I would like to extract in
> sequence each letter (character) from it. But when I use substr() I only
> properly get the first character, the rest is empty (""). What am I getting
> wrong?
> For example, I have this code:
> x <- "testing"
> k <- nchar(x)
> for (i in 1:k) {
>   y <- substr(x, i, 1)
>   print(y)
> }
>         [[alternative HTML version deleted]]
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