Hi Robin I knew that something like arev was somewhere around.
Thanks Rainer Robin Hankin wrote: > Hello > > > for vectors, use rev() > > For matrices and arbitrary-dimensioned arrays, > use arev() of the magic package: > > > > library(magic) > > b <- matrix(1:9,3,3) > > b > [,1] [,2] [,3] > [1,] 1 4 7 > [2,] 2 5 8 > [3,] 3 6 9 > > arev(b) > [,1] [,2] [,3] > [1,] 9 6 3 > [2,] 8 5 2 > [3,] 7 4 1 > > > > > > > > > On 23 Oct 2007, at 11:45, Rainer M Krug wrote: > >> Hi >> >> I have a vector >> >> x <- c(1, 2, 3, 4, 5) >> >> and I want to "flip" it around, i.e. I need >> >> 5, 4, 3, 2, 1 >> >> Is there a ssolution apart from >> >> y <- x[length(x):1] >> >> >> I am also looking for the same for a matrix M, i.e. >> >> 1 2 3 >> 4 5 6 >> 7 8 9 >> >> should become >> >> 7 8 9 >> 4 5 6 >> 1 2 3 >> >> again, I am using >> >> M[1:dim(M)[1], dim(M)[2]:1] >> >> >> Thanks >> >> Rainer >> >> ______________________________________________ >> 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. > > -- > Robin Hankin > Uncertainty Analyst > National Oceanography Centre, Southampton > European Way, Southampton SO14 3ZH, UK > tel 023-8059-7743 > ______________________________________________ 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.
