it works! thank you so much Mario
On Fri, Jan 14, 2011 at 1:29 PM, Henrique Dallazuanna <www...@gmail.com>wrote: > Try this: > > !list %in% c("aa", "bb") > > On Fri, Jan 14, 2011 at 10:19 AM, A M Lavezzi <lave...@unipa.it> wrote: > >> Hi everybody, >> >> I have the following problem. I have a vector containing character >> elements, >> such as: >> >> list = c("aa","bb","cc","dd","ee") >> >> I want to create an index which identifies the elements that are different >> from, e.g. "aa" and "bb". >> >> When I do the following: >> >> jj = list!="aa" & list!="bb" >> >> > jj >> [1] FALSE FALSE TRUE TRUE TRUE >> >> I do the job. But I wonder whether there is a shorter command to compare >> the >> elements of 'list' directly to both "aa" and "bb", avoiding the repetition >> of '& list!=...' and get a result such as jj >> >> thanks! >> >> >> >> >> -- >> Andrea Mario Lavezzi >> currently visiting the University of Oxford, Nuffield College >> >> Dipartimento Studi su Politica, Diritto e SocietÄ >> >> Piazza Bologni 8 >> 90134 Palermo, Italy >> tel. ++39 091 23892208 >> fax ++39 091 6112023 >> skype: lavezzimario >> email: lave...@unipa.it >> web: http://www.unipa.it/~lavezzi <http://www.unipa.it/%7Elavezzi> >> >> [[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. >> >> > > > -- > Henrique Dallazuanna > Curitiba-Paraná-Brasil > 25° 25' 40" S 49° 16' 22" O > -- Andrea Mario Lavezzi currently visiting the University of Oxford, Nuffield College Dipartimento Studi su Politica, Diritto e Società Piazza Bologni 8 90134 Palermo, Italy tel. ++39 091 23892208 fax ++39 091 6112023 skype: lavezzimario email: lave...@unipa.it web: http://www.unipa.it/~lavezzi [[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.