Bingo! Thx Gabor. Thank you too Tal, I looked briefly at the package and it looks like a nice interface. I keep it in mind for later.
Cheers Joris On Fri, May 28, 2010 at 2:25 PM, Gabor Grothendieck <ggrothendi...@gmail.com > wrote: > Try this: > > as.numeric(gsub("\\D", "", X)) > > On Fri, May 28, 2010 at 8:21 AM, Joris Meys <jorism...@gmail.com> wrote: > > Dear all, > > > > I have a vector of filenames which begins like this : > > X <- c("OrthoP1_DNA_str.aln", "OrthoP10_DNA_str.aln", > > "OrthoP100_DNA_str.aln", > > "OrthoP101_DNA_str.aln", "OrthoP102_DNA_str.aln", > "OrthoP103_DNA_str.aln", > > "OrthoP104_DNA_str.aln", "OrthoP105_DNA_str.aln", > "OrthoP106_DNA_str.aln", > > "OrthoP107_DNA_str.aln") > > > > using > > grep("(\\d+)",X,perl=T,value=T) > > > > I get the complete values back. Yet, I want a vector : > > > > c(1,10,100,101,102,103,104,105,106,107) > > > > In Perl, using the brackets allows for extracting only the numbers (using > a > > construct with $1 for those who know Perl). > > > > I want to do the same in R, but can't find a way of doing that without > > extensive string manipulations. Problem is that the length of the numbers > > differ, so I can't use substr. > > I tried > >> strsplit(X,"\\d+") > > [[1]] > > [1] "OrthoP" "_DNA_str.aln" > > which gives me exactly what I want to throw away. So : > >> strsplit(X,"\\D+") > > [[1]] > > [1] "" "1" > > > > [[2]] > > [1] "" "10" > > gives something I can use, but it still requires a lot of list > manipulation > > afterwards to get the right vector. Is there an option or a function I'm > > missing somewhere? > > > > Cheers > > Joris > > > > -- > > Joris Meys > > Statistical Consultant > > > > Ghent University > > Faculty of Bioscience Engineering > > Department of Applied mathematics, biometrics and process control > > > > Coupure Links 653 > > B-9000 Gent > > > > tel : +32 9 264 59 87 > > joris.m...@ugent.be > > ------------------------------- > > Disclaimer : http://helpdesk.ugent.be/e-maildisclaimer.php > > > > [[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. > > > -- Joris Meys Statistical Consultant Ghent University Faculty of Bioscience Engineering Department of Applied mathematics, biometrics and process control Coupure Links 653 B-9000 Gent tel : +32 9 264 59 87 joris.m...@ugent.be ------------------------------- Disclaimer : http://helpdesk.ugent.be/e-maildisclaimer.php [[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.