Ah, thanks. That makes sense. John Kane Kingston ON Canada
> -----Original Message----- > From: petr.pi...@precheza.cz > Sent: Mon, 27 Apr 2015 08:29:36 +0000 > To: giorgio.garzi...@ericsson.com, r-help@r-project.org > Subject: Re: [R] Question about base::rank results > > Hi > > You want to use order. > > rank gives you position of x according their values. > >> x <- c(12,34,15,77,78,22) > >> rank(x) > [1] 1 4 2 5 6 3 > > order gives you sorting vector to get your values in ascending or > descending order. > >> order(x) > [1] 1 3 6 2 4 5 >> x[order(x)] > [1] 12 15 22 34 77 78 > > You can see it as > > as first element 12 is selected - 1 > as second element 15 is selected - 3 > as third element 22 is selected - 6 > ... > > Cheers > Petr > >> -----Original Message----- >> From: R-help [mailto:r-help-boun...@r-project.org] On Behalf Of Giorgio >> Garziano >> Sent: Sunday, April 26, 2015 10:18 AM >> To: r-help@r-project.org >> Subject: [R] Question about base::rank results >> >> Hi, >> >> I cannot understand why rank(x) behaves as outlined below. >> Based on the results of first x vector values ranking, which is as >> expected in my opinion, I cannot explain the following results. >> >>> x <- c(12,34,15,77,78) >>> x[rank(x)] >> [1] 12 15 34 77 78 (OK) >> >>> x <- c(12,34,15,77,78,22) >>> x[rank(x)] >> [1] 12 77 34 78 22 15 (?) >> >>> x <- c(12,34,77,15,78) >>> x[rank(x)] >> [1] 12 77 15 34 78 (?) >> >> Please any feedback ? Thanks. >> >> BR, >> >> Giorgio Garziano >> >> >> >> [[alternative HTML version deleted]] >> >> ______________________________________________ >> R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see >> 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. > > ________________________________ > Tento e-mail a jakékoliv k němu připojené dokumenty jsou důvěrné a jsou > určeny pouze jeho adresátům. > Jestliže jste obdržel(a) tento e-mail omylem, informujte laskavě > neprodleně jeho odesílatele. 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