# [R] About list to list

Gabor Grothendieck ggrothendieck at gmail.com
Tue Apr 11 15:48:25 CEST 2006

```Are you trying to turn each of the components of foo into a matrix?
If that's it then:

lapply(foo, function(x) matrix(unlist(x), nrow = length(x)))

On 4/11/06, Muhammad Subianto <msubianto at gmail.com> wrote:
> Dear all,
> I have a result my experiment like this below (here my toy example):
>
> foo1 <- list()
> foo1[[1]] <- c(10, 20, 30)
> foo1[[2]] <- c(11, 21, 31)
>
> foo2 <- list()
> foo2[[1]] <- c(100, 200, 300)
> foo2[[2]] <- c(110, 210, 310)
>
> foo3 <- list()
> foo3[[1]] <- c(1000, 2000, 3000)
> foo3[[2]] <- c(1100, 2100, 3100)
>
> list(foo1,foo2,foo3)
>
> The result:
> > list(foo1,foo2,foo3)
> [[1]]
> [[1]][[1]]
> [1] 10 20 30
>
> [[1]][[2]]
> [1] 11 21 31
>
> [[2]]
> [[2]][[1]]
> [1] 100 200 300
>
> [[2]][[2]]
> [1] 110 210 310
>
> [[3]]
> [[3]][[1]]
> [1] 1000 2000 3000
>
> [[3]][[2]]
> [1] 1100 2100 3100
>
> >
> I want to convert like this below (as list).
>
> [[1]]
> [1] 10 20 30
> [2] 11 21 31
>
> [[2]]
> [1] 100 200 300
> [2] 110 210 310
>
> [[3]]
> [1] 1000 2000 3000
> [2] 1100 2100 3100
>
> I saw on the R-help archives page similar like this but I can't find a
> solution.
> http://tolstoy.newcastle.edu.au/R/help/05/05/4678.html
> Thanks very much for any suggestions.
>