[R] how to collapse a list of 1 column matrix to a matrix?

[Gabor Grothendieck]

Try this:

L <- list(`1` = matrix(1:4, 4), `2` = matrix(5:8, 4))
sapply(L, c)

Note that the list component names are kept as column names in the result


On 8/19/07, adschai at optonline.net <adschai at optonline.net> wrote:
> Hi,
>
> I encounter a situation where I have a list whose element is a column matrix. Says,
>
> $'1'
> [,1]
> 1
> 2
> 3
>
> $'2'
> [,1]
> 4
> 5
> 6
>
> Is there fast way to collapse the list into a matrix like a cbind operation in this case? Meaning, the result should be a matrix that looks like:
>
>      [,1]  [,2]
> [1,]    1      4
> [2,]    2      5
> [3,]    3      6
>
> I can loop through all elements and do cbind manually. But I think there must be a simpler way that I don't know. Thank you.
>
> - adschai
>
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