[R] How do I access a specific element of a multi-dimensional list

[jim holtman]

try this:

> a = c(2, 3, 5)
>  b = c("aa", "bb", "cc")
>  c = c(TRUE, FALSE, TRUE)
>
>  x = list(a, b, c)
> x
[[1]]
[1] 2 3 5
[[2]]
[1] "aa" "bb" "cc"
[[3]]
[1]  TRUE FALSE  TRUE
> sapply(x, '[[', 1)
[1] "2"    "aa"   "TRUE"
>

Jim Holtman
Data Munger Guru

What is the problem that you are trying to solve?
Tell me what you want to do, not how you want to do it.


On Fri, Feb 20, 2015 at 7:18 AM, Knut Hansen <knut.hansen at uit.no> wrote:
> Dear list,
>
> Let's say I have setup the following list:
> a = c(2, 3, 5)
> b = c("aa", "bb", "cc")
> c = c(TRUE, FALSE, TRUE)
>
> x = list(a, b, c)
>
> I want to access the first second dimension element of each first dimension
> element so that the result is something like:
> (2, "aa", TRUE)
>
> In my real life problem the list is about 350 elements in the first dimension
> so the solution must handle that.
>
> Sincerely
> Knut Hansen
>
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