Yeah, that sounds inefficient to me also. I think you'd be better off using
multidimensional arrays instead of lists, since all your values are numeric.
See ?array.

Miguel


2010/3/15 Mįrcio Resende <mresendeufv@yahoo.com.br>

>
> Hello R-helpers,
> I have the following code that works well,
>
> b <-list()
> for (i in 1:3){
> a <- matrix(runif(1),3,3)
> b[[i]] <- a
> }
> b
>
> however, I need to do something similar with two loops and I was looking
> for
> something that would look like
>
> b <- list()
> for (i in 1:3){
> for (j in 1:4){
> a <- matrix(runif(1),3,3)
> b[[i,j]] <- a #but this doesn“t work
> }
> }
>
> Anyway, I wanted "b" to loop like
> [[i=1, j=1]]         [[i=1, j=2]]     (...)
> a[i=1, j=1]           a[i=1,j=2]      (...)
>
> [[i = 2, j=1]]    (...)
> a[i = 2, j = 1]   (...)
>
> (...)
>
> Can anybody help me?
> Thanks
>
> --
> View this message in context:
> http://n4.nabble.com/storing-matrix-variables-in-loop-tp1593461p1593461.html
> Sent from the R help mailing list archive at Nabble.com.
>
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>

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