Hi:
The problem, I'm guessing, is that you need to assign each of the matrices
to an object.
There's undoubtedly a slick apply family solution for this (which I want to
see, BTW!),
but here's the brute force method using a loop:
nms <- paste('x', 1:32, sep = "")
for(i in seq_along(nms)) assign(nms[i], x[[i]])
HTH,
Dennis
On Fri, Jan 29, 2010 at 6:30 AM, Muhammad Rahiz <
muhammad.ra...@ouce.ox.ac.uk> wrote:
> Hello all,
>
> I'm trying to create a 2x2 matrix, 32 times after unlist() so that I can
> convert the list to matrix. I've looked through the R archive but couldn't
> find the answer. There is what I've done.
>
>
> > f <- system("ls *.txt", intern=TRUE)
> > x <- lapply(f, read.table)
> > x
> [[1]]
> V1 V2
> 1 -27.3 14.4
> 2 29.0 -38.1
>
> [[2]]
> V1 V2
> 1 14.4 29.0
> 2 -38.1 -3.4
>
> [[3]]
> V1 V2
> 1 29.0 -38.1
> 2 -3.4 55.1
>
> [[4]]
> V1 V2
> 1 -38.1 -3.4
> 2 55.1 -1.0
>
> [[5]]
> V1 V2
> 1 -3.4 55.1
> 2 -1.0 21.9
>
> [[6]]
> V1 V2
> 1 55.1 -1.0
> 2 21.9 -10.9
>
> ...
>
> > xx <- unlist(x)
> V11 V12 V21 V22 V11 V12 V21 V22 V11 V12 V21 V22
> -27.3 29.0 14.4 -38.1 14.4 -38.1 29.0 -3.4 29.0 -3.4 -38.1 55.1
> V11 V12 V21 V22 V11 V12 V21 V22 V11 V12 V21 V22
> -38.1 55.1 -3.4 -1.0 -3.4 -1.0 55.1 21.9 55.1 21.9 -1.0 -10.9
> V11 V12 V21 V22 V11 V12 V21 V22 V11 V12 V21 V22
> -1.0 -10.9 21.9 -7.8 21.9 -7.8 -10.9 -48.2 -10.9 -48.2 -7.8 -44.9
> V11 V12 V21 V22 V11 V12 V21 V22 V11 V12 V21 V22
> -7.8 -44.9 -48.2 -43.8 -48.2 -43.8 -44.9 -10.3 -44.9 -10.3 -43.8 44.2
> V11 V12 V21 V22 V11 V12 V21 V22 V11 V12 V21 V22
> -43.8 44.2 -10.3 -0.5 -10.3 -0.5 44.2 96.7 44.2 96.7 -0.5 -32.0
> V11 V12 V21 V22 V11 V12 V21 V22 V11 V12 V21 V22
> -0.5 -32.0 96.7 -0.2 96.7 -0.2 -32.0 -38.6 -32.0 -38.6 -0.2 73.6
> V11 V12 V21 V22 V11 V12 V21 V22 V11 V12 V21 V22
> -0.2 73.6 -38.6 -17.5 -38.6 -17.5 73.6 -57.8 73.6 -57.8 -17.5 10.7
> V11 V12 V21 V22 V11 V12 V21 V22 V11 V12 V21 V22
> -17.5 10.7 -57.8 -33.4 -57.8 -33.4 10.7 46.1 10.7 46.1 -33.4 26.7
> V11 V12 V21 V22 V11 V12 V21 V22 V11 V12 V21 V22
> -33.4 26.7 46.1 -37.3 46.1 -37.3 26.7 1.2 26.7 1.2 -37.3 36.3
> V11 V12 V21 V22 V11 V12 V21 V22 V11 V12 V21 V22
> -37.3 36.3 1.2 39.6 1.2 39.6 36.3 31.0 36.3 -27.3 39.6 14.4
> V11 V12 V21 V22 V11 V12 V21 V22
> 39.6 29.0 31.0 -38.1 31.0 -3.4 -27.3 55.1
>
>
> The output should be
>
> [[1]]
> [,1] [,2]
> [1,] -27.3 14.4
> [2,] 29.0 -38.1
>
> [[2]]
> [,1] [,2]
> [1,] 14.4 29.0
> [2,] -38.1 -3.4
>
> [[3]]
> [,1] [,2]
> [1,] 29.0 -38.1
> [2,] -3.4 55.1
>
> ...
> Thanks and much appreciated!
>
>
>
> Muhammad
>
> ______________________________________________
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> http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
>
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