In y <- substr(x, i, 1)
your third integer needs to be the location not the number of digits, so change it to y <- substr(x, i, i) and you should get what you want. Cheers, Tim > Date: Sun, 21 Jan 2018 10:50:31 -0500 > From: Ek Esawi <esaw...@gmail.com> > To: Luigi Marongiu <marongiu.lu...@gmail.com>, r-help@r-project.org > Subject: Re: [R] substr gives empty output > Message-ID: > <CA+ZkTxubYDSZ3iqsg_=be9HBA2_3-TE95=mXbh4atvG- > ri_...@mail.gmail.com> > Content-Type: text/plain; charset="UTF-8" > > 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. > > HTH > > EK > > On Sun, Jan 21, 2018 at 3:59 AM, Luigi Marongiu <marongiu.lu...@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]] > > > > ______________________________________________ > > R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see > > https://stat.ethz.ch/mailman/listinfo/r-help > > PLEASE do read the posting guide > > http://www.R-project.org/posting-guide.html > > and provide commented, minimal, self-contained, reproducible code. > > ______________________________________________ R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.