You also might look at grepl() if you have time: it allows regular expressions and will be a little (a lot?) more flexible in how you define a match if you want to ignore things like capitalization.
(mnemonic: the L in grepl indicates its like grep but returns logicals instead of positions) Michael On Jan 20, 2012, at 7:42 AM, "Johannes Radinger" <jradin...@gmx.at> wrote: > Hi, > > thank you very much... %in% is the operator I was looking for. > > cheers, > johannes > > -------- Original-Nachricht -------- >> Datum: Fri, 20 Jan 2012 13:01:54 +0100 >> Von: Rainer M Krug <r.m.k...@gmail.com> >> An: Johannes Radinger <jradin...@gmx.at> >> CC: R-help@r-project.org >> Betreff: Re: [R] test if text is part of vector > >> -----BEGIN PGP SIGNED MESSAGE----- >> Hash: SHA1 >> >> On 20/01/12 12:50, Johannes Radinger wrote: >>> Hello, >>> >>> this is a very simple question: How can I find out if a word is >>> part of a list of words >>> >>> like: a <- "word1" b <- "word4" >>> >>> vector <- c("word1","word2","word3") >>> >>> I tried it with match(a,vector) but this gives the position of the >>> word. >>> >>> I am not sure if and how that can be done with a logical operator >>> like if: IF text is part of vector THEN print "is part" >>> >>> Probably a very easy thing to do, but I am missing the logical >>> operator... and help(if) is not working >> >> check out %in% >> >> help: >> >> ?"%in%" >> >> Cheers, >> >> Rainer >> >>> >>> best regards, johannes >> >> >> - -- >> Rainer M. Krug, PhD (Conservation Ecology, SUN), MSc (Conservation >> Biology, UCT), Dipl. Phys. (Germany) >> >> Centre of Excellence for Invasion Biology >> Stellenbosch University >> South Africa >> >> Tel : +33 - (0)9 53 10 27 44 >> Cell: +33 - (0)6 85 62 59 98 >> Fax : +33 - (0)9 58 10 27 44 >> >> Fax (D): +49 - (0)3 21 21 25 22 44 >> >> email: rai...@krugs.de >> >> Skype: RMkrug >> -----BEGIN PGP SIGNATURE----- >> Version: GnuPG v1.4.11 (GNU/Linux) >> Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/ >> >> iEYEARECAAYFAk8ZV7IACgkQoYgNqgF2egroawCfYAN/eOBMKN4VDTbBZtiBVGdS >> LAUAnR+h9kg2INJTICiGIAUTfYm2fCbC >> =Ws2h >> -----END PGP SIGNATURE----- > > -- > "Feel free" - 10 GB Mailbox, 100 FreeSMS/Monat ... > > ______________________________________________ > 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. ______________________________________________ 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.