Tena koe Try something like:
tmp[rep(1:nrow(tmp), each=tmp[,4]),] # untested HTH ... Peter Alspach > -----Original Message----- > From: r-help-boun...@r-project.org [mailto:r-help-bounces@r- > project.org] On Behalf Of jjap > Sent: Wednesday, 30 March 2011 7:16 a.m. > To: r-help@r-project.org > Subject: [R] Simple but elusive - expand back from counts > > Dear R-users, > > This should be simple but still eludes me: > > Given the following > tmp<-as.data.frame(matrix(c(44, 10, "abc", 1, 44, 10, "def", 1, 44, 12, > "abc", 2), 3, 4, byrow=T)) > > I want to expand the data to the following form: > > V1 V2 V3 V4 > 1 44 10 abc 1 > 2 44 10 def 1 > 3 44 12 abc 1 > 4 44 12 abc 1 > > The last row of the original df was duplicated the row by the number in > the > 4th column (which could be expendable being all ones) > I clumsily tried a few variants of a loop but I am not making any > progress. > Any hints would be greatly appreciated. > for (i in 1:3){ > rbind(rep(tmp[i,], temp[i,4]) > } > > -- > View this message in context: http://r.789695.n4.nabble.com/Simple-but- > elusive-expand-back-from-counts-tp3415727p3415727.html > Sent from the R help mailing list archive at Nabble.com. > > ______________________________________________ > 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. The contents of this e-mail are confidential and may be subject to legal privilege. If you are not the intended recipient you must not use, disseminate, distribute or reproduce all or any part of this e-mail or attachments. If you have received this e-mail in error, please notify the sender and delete all material pertaining to this e-mail. Any opinion or views expressed in this e-mail are those of the individual sender and may not represent those of The New Zealand Institute for Plant and Food Research Limited. ______________________________________________ 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.
