[R] rearrange data columns
Dear R users, I need to to the the following. Let a= 1 2 3 4 5 6 and b= -1 -2 -3 be (2x3) matrices. -4 -5 -6 I need to combine the two matrices into a new (2x6) matrix like this: ab = ( 1 -1 2 -2 3 -3 ) 4 -4 5 -5 6 -6 How can this be done in R? - Крайна цел - Да оцелееш! www.survivor.btv.bg __ 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.
Re: [R] rearrange data columns
On 11 Oct 2007, at 12:55, Martin Ivanov wrote: Dear R users, I need to to the the following. Let a= 1 2 3 4 5 6 and b= -1 -2 -3 be (2x3) matrices. -4 -5 -6 I need to combine the two matrices into a new (2x6) matrix like this: ab = ( 1 -1 2 -2 3 -3 ) 4 -4 5 -5 6 -6 How can this be done in R? a [,1] [,2] [,3] [1,]123 [2,]456 b [,1] [,2] [,3] [1,] -1 -2 -3 [2,] -4 -5 -6 x - cbind(a,b)+NA x [,1] [,2] [,3] [,4] [,5] [,6] [1,] NA NA NA NA NA NA [2,] NA NA NA NA NA NA x[,seq(from=1,by=2,len=3)] - a x[,seq(from=2,by=2,len=3)] - b x [,1] [,2] [,3] [,4] [,5] [,6] [1,]1 -12 -23 -3 [2,]4 -45 -56 -6 HTH rksh - Крайна цел - Да оцелееш! www.survivor.btv.bg __ 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.
Re: [R] rearrange data columns
Martin Ivanov wrote: Dear R users, I need to to the the following. Let a= 1 2 3 4 5 6 and b= -1 -2 -3 be (2x3) matrices. -4 -5 -6 I need to combine the two matrices into a new (2x6) matrix like this: ab = ( 1 -1 2 -2 3 -3 ) 4 -4 5 -5 6 -6 How can this be done in R? Here's one way: a - matrix(1:6, 2, byrow=T) b - -a ab - rbind(a,b); dim(ab)=c(2,6) ab [,1] [,2] [,3] [,4] [,5] [,6] [1,]1 -12 -23 -3 [2,]4 -45 -56 -6 Here's another: ab - matrix(,2,6) ab[,seq(1,,2,3)] - a ab[,seq(2,,2,3)] - b ab [,1] [,2] [,3] [,4] [,5] [,6] [1,]1 -12 -23 -3 [2,]4 -45 -56 -6 -- O__ Peter Dalgaard Øster Farimagsgade 5, Entr.B c/ /'_ --- Dept. of Biostatistics PO Box 2099, 1014 Cph. K (*) \(*) -- University of Copenhagen Denmark Ph: (+45) 35327918 ~~ - ([EMAIL PROTECTED]) FAX: (+45) 35327907 __ 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.
Re: [R] rearrange data columns
On 10/11/07, Martin Ivanov [EMAIL PROTECTED] wrote: Dear R users, I need to to the the following. Let a= 1 2 3 4 5 6 and b= -1 -2 -3 be (2x3) matrices. -4 -5 -6 I need to combine the two matrices into a new (2x6) matrix like this: ab = ( 1 -1 2 -2 3 -3 ) 4 -4 5 -5 6 -6 How can this be done in R? (a - matrix(1:6, nr = 2)) [,1] [,2] [,3] [1,]135 [2,]246 (b - -a) [,1] [,2] [,3] [1,] -1 -3 -5 [2,] -2 -4 -6 (ans - rbind(a, b)) [,1] [,2] [,3] [1,]135 [2,]246 [3,] -1 -3 -5 [4,] -2 -4 -6 dim(ans) - c(2, 6) ans [,1] [,2] [,3] [,4] [,5] [,6] [1,]1 -13 -35 -5 [2,]2 -24 -46 -6 __ 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.
Re: [R] rearrange data columns
Try this also: ab - do.call(cbind, list(a, b))[,c(1,4,2,5,3,6)] On 11/10/2007, Martin Ivanov [EMAIL PROTECTED] wrote: Dear R users, I need to to the the following. Let a= 1 2 3 4 5 6 and b= -1 -2 -3 be (2x3) matrices. -4 -5 -6 I need to combine the two matrices into a new (2x6) matrix like this: ab = ( 1 -1 2 -2 3 -3 ) 4 -4 5 -5 6 -6 How can this be done in R? - §¬§â§Ñ§Û§ß§Ñ §è§Ö§Ý - §¥§Ñ §à§è§Ö§Ý§Ö§Ö§ê! www.survivor.btv.bg __ 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-Paran¨¢-Brasil 25¡ã 25' 40 S 49¡ã 16' 22 O [[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.
Re: [R] rearrange data columns
On 11-Oct-07 12:09:19, Robin Hankin wrote: On 11 Oct 2007, at 12:55, Martin Ivanov wrote: Dear R users, I need to to the the following. Let a= 1 2 3 4 5 6 and b= -1 -2 -3 be (2x3) matrices. -4 -5 -6 I need to combine the two matrices into a new (2x6) matrix like this: ab = ( 1 -1 2 -2 3 -3 ) 4 -4 5 -5 6 -6 How can this be done in R? a [,1] [,2] [,3] [1,]123 [2,]456 b [,1] [,2] [,3] [1,] -1 -2 -3 [2,] -4 -5 -6 x - cbind(a,b)+NA x [,1] [,2] [,3] [,4] [,5] [,6] [1,] NA NA NA NA NA NA [2,] NA NA NA NA NA NA x[,seq(from=1,by=2,len=3)] - a x[,seq(from=2,by=2,len=3)] - b x [,1] [,2] [,3] [,4] [,5] [,6] [1,]1 -12 -23 -3 [2,]4 -45 -56 -6 HTH rksh What's wrong with a ## [,1] [,2] [,3] ##[1,]123 ##[2,]456 b ## [,1] [,2] [,3] ##[1,] -1 -2 -3 ##[2,] -4 -5 -6 cbind(a,b)[,c(1,4,2,5,3,6)] ## [,1] [,2] [,3] [,4] [,5] [,6] ##[1,]1 -12 -23 -3 ##[2,]4 -45 -56 -6 ?? Of course, for a more general case, you'd need a method for generating the appropriate version of c(1,4,2,5,3,6) -- e.g. something like Robin's seq. Best wishes, Ted. E-Mail: (Ted Harding) [EMAIL PROTECTED] Fax-to-email: +44 (0)870 094 0861 Date: 11-Oct-07 Time: 13:46:06 -- XFMail -- __ 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.
