Hi Mat, The following should get you started:
> s <- "Mercedes_02352" > substr(s, nchar(s) - 3, nchar(s) - 1) [1] "235" > > # defining a function > foo <- function(x, a = 3, b = 1) substr(s, nchar(x) - a, nchar(x) - b) > foo(s) [1] "235" HTH, Jorge.- On Wed, Jan 30, 2013 at 8:05 PM, Mat <> wrote: > Hello together, > > i have a question for "substring". > I know i can filter a number like this one: > bill$No<-substring(bill$Customer,2,4) > > in this case i get the 2nd, 3rd and 4th number of my Customer ID. > But how can i do this, if i want the 2nd, 3rd and 4th number of a column. > > Like this one. > I have: Mercedes_02352 > Audi_03555 > and now i want to filter this data.frame to > 235 > 355 > > can you help me? > > Thanks. > > Mat > > > > -- > View this message in context: > http://r.789695.n4.nabble.com/substring-from-behind-tp4657029.html > Sent from the R help mailing list archive at Nabble.com. > > ______________________________________________ > R-help@r-project.org mailing list > 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. > [[alternative HTML version deleted]] ______________________________________________ R-help@r-project.org mailing list 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.
