[R] 1st el of a list of vectors

[Richard M. Heiberger]

l = list(c(1,2), c(3,5,6), c(7))

sapply(l, `[`, 1)

On Mon, Jul 21, 2014 at 3:55 PM, carol white <wht_crl at yahoo.com> wrote:
> Hi,
> If we have a list of vectors of different lengths, how is it possible to retrieve the first element of the vectors of the list?
>
>
> l = list(c(1,2), c(3,5,6), c(7))
>
> 1,3,7 should be retrieved
>
> Thanks
>
> Carol
>         [[alternative HTML version deleted]]
>
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