Re: [R] how to reshape an array avoiding for loops

From: Berton Gunter <gunter.berton_at_gene.com>
Date: Wed 17 Aug 2005 - 07:16:54 EST


?aperm

"The business of the statistician is to catalyze the scientific learning process." - George E. P. Box    

> -----Original Message-----
> From: r-help-bounces@stat.math.ethz.ch
> [mailto:r-help-bounces@stat.math.ethz.ch] On Behalf Of
> Wladimir Eremeev
> Sent: Tuesday, August 16, 2005 2:12 PM
> To: r-help@stat.math.ethz.ch
> Subject: [R] how to reshape an array avoiding for loops
>
> Dear r-help,
>
> I have an array a1 with dimensions [1:660,1:65,1:25]
> I would like the first dimension to be the last one.
> That is I want and array [1:65,1:25,1:660]
>
> The only way to do this, I know, is
>
> tmp.a<-array(dim=dim(a1)[c(2,3,1)])
> for(i in 1:dim(a1)[1]) tmp.a[,,i]<-a1[i,,]
> a1<-tmp.a
> rm(tmp.a)
>
>
> Is it possible to avoid 'for' loop here?

>
> Thank you!
>
> ---
> Best regards,
> Wladimir mailto:wl@eimb.ru
>
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R-help@stat.math.ethz.ch mailing list
https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html Received on Wed Aug 17 07:24:19 2005

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