Hi Gabor, thanks (and Jim as well) for your suggestion. However this is not working properly for following string:
> MyString <- "ABCFR34564IJVEOJC3434.36453" > strapply(MyString, "(\\D+)(\\d+)(\\D+)(\\d <file://d+)(//d+)(//D+)(//d>+)", c)[[1]] [1] "ABCFR" "34564" "IJVEOJC" "3434" Therefore there is decimal number in the 4th group, which is numeric then that is not taken care off........... Similarly same kind of unintended result here as well: > MyString <- "ABCFR34564.354IJVEOJC3434.36453" > strapply(MyString, "(\\D+)(\\d+)(\\D+)(\\d <file://d+)(//d+)(//D+)(//d>+)", c)[[1]] [1] "ABCFR" "34564" "." "354" "IJVEOJC" "3434" "." "36453" Can you please tell me how can I modify that? Thanks, On Sun, Feb 13, 2011 at 11:10 PM, Gabor Grothendieck < ggrothendi...@gmail.com> wrote: > On Sun, Feb 13, 2011 at 10:27 AM, Megh Dal <megh700...@gmail.com> wrote: > > Please consider following string: > > > > MyString <- "ABCFR34564IJVEOJC3434" > > > > Here you see that, there are 4 groups in above string. 1st and 3rd groups > > are for english letters and 2nd and 4th for numeric. Given a string, how > can > > I separate out those 4 groups? > > > > Try this. "\\D+" and "\\d+" match non-digits and digits respectively. > The portions within parentheses are captures and passed to the c > function. It returns a list with a component for each element of > MyString. Like R's split it returns a list with a component per > element of MyString but MyString only has one element so we get its > contents using [[1]]. > > > library(gsubfn) > > strapply(MyString, "(\\D+)(\\d+)(\\D+)(\\d+)", c)[[1]] > [1] "ABCFR" "34564" "IJVEOJC" "3434" > > Alternately we could convert the relevant portions to numbers at the > same time. ~ list(...) is interpreted as a function whose body is > the right hand side of the ~ and whose arguments are the free > variables, i.e. s1, s2, s3 and s4. > > strapply(MyString, "(\\D+)(\\d+)(\\D+)(\\d+)", ~ list(s1, > as.numeric(s2), s3, as.numeric(s4)))[[1]] > > See http://gsubfn.googlecode.com for more. > > -- > Statistics & Software Consulting > GKX Group, GKX Associates Inc. > tel: 1-877-GKX-GROUP > email: ggrothendieck at gmail.com > [[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.
