Hi Petr I think cast() has been dropped from the most recent reshape2 and you need dcast(data, siteS~species) instead
John Kane Kingston ON Canada > -----Original Message----- > From: petr.pi...@precheza.cz > Sent: Tue, 27 May 2014 11:46:13 +0000 > To: kristi.glo...@hotmail.com, r-help@r-project.org > Subject: Re: [R] How to unstack three columns into rows? > > Hi > > cast(data, siteS~species) > > gives you quite close result, only row ordering is different > > Regards > Petr > > >> -----Original Message----- >> From: r-help-boun...@r-project.org [mailto:r-help-bounces@r- >> project.org] On Behalf Of Kristi Glover >> Sent: Tuesday, May 27, 2014 12:54 PM >> To: R-help >> Subject: [R] How to unstack three columns into rows? >> >> Dear R User, >> I was wondering how I can unstack my data. For example I have following >> data set >> >> data<-structure(list(siteS = structure(c(3L, 3L, 3L, 4L, 4L, 5L, 5L, >> 5L, 5L, 5L, 1L, 1L, 1L, 2L), .Label = c("11a", "12d", "1a", "2v", >> "6a"), class = "factor"), species = structure(c(1L, 2L, 3L, 1L, 4L, 1L, >> 4L, 5L, 2L, 3L, 1L, 6L, 3L, 1L), .Label = c("sa", "sb", "sc", "sd", >> "se", "sg"), class = "factor"), abundance = c(31L, 55L, 62L, 42L, 40L, >> 30L, 84L, 10L, 23L, 74L, 11L, 51L, 37L, 15L )), .Names = c("siteS", >> "species", "abundance"), class = "data.frame", row.names = c(NA, >> -14L)) >> >> I wanted to have this data into following format >> >> newData<-structure(list(siteS = structure(c(3L, 4L, 5L, 1L, 2L), .Label >> = c("11a", "12d", "1a", "2v", "6a"), class = "factor"), sa = c(31L, >> 42L, 30L, 11L, 15L), sb = c(55L, NA, 84L, NA, NA), sc = c(62L, NA, 10L, >> 37L, NA), sd = c(NA, 40L, 23L, NA, NA), se = c(NA, NA, 74L, NA, NA), sg >> = c(NA, NA, NA, 51L, NA)), .Names = c("siteS", "sa", "sb", "sc", "sd", >> "se", "sg"), class = "data.frame", row.names = c(NA, >> -5L)) >> >> I tried several ways such as: >>> data.frame(unstack(data, species~siteS)) >> Error in data.frame(`11a` = c("sa", "sg", "sc"), `12d` = "sa", `1a` = >> c("sa", : >> arguments imply differing number of rows: 3, 1, 2, 5 >> >> >> >> [[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. > > ________________________________ > 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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