[R] list of lists

[Thomas Lumley]

On Mon, 17 Jun 2002, Juan Ramon Gonzalez wrote:

> Hi R-users
>
> I have a list with 19 elments. This elements are a new list of 2 elements,
> for example:
>
> times<-
> [[1]]
> [[1]]$time
>  11  10
> 147 206  30
>
> [[1]]$n
> [1] 3
>
> .......
>
> [[19]]
> [[19]]$time
>  96  96  96  94  98
>  78  78  78 147 100   4
>
> [[19]]$n
> [1] 6
>
> Does anyone know how obtain a vector with the elements $time as quick as
> possible (no loops)?
>

assuming you want them all concatenated

 unlist(lapply(times, function(x) x$time))

If you have lots of short lists like this one it may not be much faster
than a loop, but with long lists it should be.

	-thomas

Thomas Lumley			Asst. Professor, Biostatistics
tlumley at u.washington.edu	University of Washington, Seattle

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