[R] All anchored series from a vector?

Gabor Csardi csardi at rmki.kfki.hu
Tue Dec 18 22:00:00 CET 2007


miracle <- function(x) { lapply(seq(along=x), function(y) x[1:y]) }

Gabor

On Tue, Dec 18, 2007 at 11:40:37PM +0100, Johannes Graumann wrote:
> Hi all,
> 
> What may be a smart, efficient way to get the following result:
> 
> myvector <- c("A","B","C","D","E")
> myseries <- miracle(myvector)
> myseries
> [1]
> [[1]] "A"
> [2]
> [[1]] "A" "B"
> [3]
> [[1]] "A" "B"
> [4]
> [[1]] "A" "B" "C"
> [5]
> [[1]] "A" "B" "C" "D"
> [6]
> [[1]] "A" "B" "C" "D" "E"
> 
> Thanks for any hints,
> 
> Joh
> 
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-- 
Csardi Gabor <csardi at rmki.kfki.hu>    MTA RMKI, ELTE TTK



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