On Mon, 13 Oct 2003, Simon Fear wrote: > Well, this works for the first one: > > > sub(" \\([A-Za-z0-9_ ]*\\)", "", Names) > > and from there the second one is fairly obvious I hope. > > QUESTION: having recently been using Source Edit I wanted > to write [\\w]* instead of [A-Za-z0-9_ ]* but that doesn't
space is not in \w ... so try > sub(" \\([\\w ]*\\)", "", Names, perl=TRUE) [1] "g 604 be-0 -p1" However > sub(".*\\((.*)\\)", "\\1", Names) picks out the parenthesized part, and sub("\\((.*)\\)", "", Names) omits it. > seem to work in R. ?grep points to > ftp://ftp.csx.cam.ac.uk/pub/software/programming/pcre/ > but I can't access that (server/gateway restriction). So, Works here. > could anyone tell me exactly what is allowed in R regular > expressions? A URL to the POSIX standards would be useful > too. > > In fact it would be even more useful if R's particular choice > of RE syntax, together with R's multiple backslashes, was given > somewhere in the R help itself ... yes I will write it if someone > gives me the info or points me in the right direction ... > > > > -----Original Message----- > > From: Martin Olivier [mailto:[EMAIL PROTECTED] > > Sent: 13 October 2003 15:31 > > To: r-help > > Subject: [R] help with gsub and grep functions > > > > > > Security Warning: > > If you are not sure an attachment is safe to open please contact > > Andy on x234. There are 0 attachments with this message. > > ________________________________________________________________ > > > > Hi all, > > > > Let Names a vector of chatacters. For example, > > > > > Names > > [1] "g 604 be-0 -p1 (602 matches)" "g 606 Phli-0 -p2 (517 matches)" > > [3] "g 608 alu-0 (659 matches)" > > > > I try to use gsub or grep functions for two problems : > > > > 1. First, I would like to delete all the characters between > > parentheses. > > [1] "g 604 be-0 -p1" "g 606 be-0 -p2" > > [3] "g 608 be-0 -p3" > > > > 2. And, I would like to extract the characters between parentheses > > [1] "602 matches" "517 matches" > > [3] "659 matches" > > > > > > > > Any idea? > > > > Best regards, > > Olivier > > > > -- > > > > ------------------------------------------------------------- > > Martin Olivier > > INRA - Unité protéomique LIRMM - IFA/MAB > > 2, Place Viala 161, rue Ada > > 34060 Montpellier Cédex 1 34392 Montpellier Cédex 5 > > > > Tel : 04 99 61 27 01 Tel : O4 67 41 86 71 > > [EMAIL PROTECTED] [EMAIL PROTECTED] > > > > ______________________________________________ > > [EMAIL PROTECTED] mailing list > > https://www.stat.math.ethz.ch/mailman/listinfo/r-help > > > > > Simon Fear > Senior Statistician > Syne qua non Ltd > Tel: +44 (0) 1379 644449 > Fax: +44 (0) 1379 644445 > email: [EMAIL PROTECTED] > web: http://www.synequanon.com > > Number of attachments included with this message: 0 > > This message (and any associated files) is confidential and\...{{dropped}} > > ______________________________________________ > [EMAIL PROTECTED] mailing list > https://www.stat.math.ethz.ch/mailman/listinfo/r-help > > -- Brian D. Ripley, [EMAIL PROTECTED] Professor of Applied Statistics, http://www.stats.ox.ac.uk/~ripley/ University of Oxford, Tel: +44 1865 272861 (self) 1 South Parks Road, +44 1865 272866 (PA) Oxford OX1 3TG, UK Fax: +44 1865 272595 ______________________________________________ [EMAIL PROTECTED] mailing list https://www.stat.math.ethz.ch/mailman/listinfo/r-help