[R-sig-eco] remove elements from a list

[Glen Sargeant]

Karl Cottenie wrote:
> 
> I want to eliminate certain elements from a list, but when I do this,  
> the list structure gets completely broken.
> 
>  > a <- list(list(list(1,2,3)))
>  
> How can I preserve the original list structure, i.e. such that the  
> output is
> 
> [[1]]
> [[1]][[1]]
> [[1]][[1]][[1]]
> [1] 2
> 
> [[1]][[1]][[2]]
> [1] 3
> 
> And why is R doing this, what is the logic for this behaviour?
> 
> 

Try this, Karl:

> a <- list(list(list(1,2,3)))
> a[[1]][[1]][1] <- NULL
> a
[[1]]
[[1]][[1]]
[[1]][[1]][[1]]
[1] 2

[[1]][[1]][[2]]
[1] 3

Good luck!

Glen

-----
Glen Sargeant
Research Wildlife Biologist
-- 
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