# [R] saving estimates from a for loop for later use

Brian Quinif bquinif at gmail.com
Sat Apr 8 03:20:57 CEST 2006

```I kind of understand this recommendation, but I can't figure out how
to work with x once I have created it.  Here is some fully
reproducible code.  It creates a 4x1 matrices within the loops.  Once
done with the looping, I want to cbind these matrices together.  I
know it's a simple question, but I can't figure it out.

x <- list()
for (i in 2:3)
for (j in 11:12) {
estimates <- matrix(c(i,j,i+j,i*j),nrow=4)
x[[as.character(i)]][[as.character(j)]]  <- estimates
}

So, once I've done this, how can I reference, say, the "estimates"
matrix created when i=2 and j=12?

Thanks,

BQ

2006/4/7, jim holtman <jholtman at gmail.com>:
>
> use a 'list';
>
> x <- list()
> for (i in 1:3)
>   for (j in 0:2) {
>      x[[as.character(i)]][[as.character(j)]] <- yourResults
> }
>
>
>
> On 4/7/06, Brian Quinif <bquinif at gmail.com> wrote:
> >
> Thanks to the help of many on this list, I am now an R user and have
> been able to write some functioning code to do matching estimation.
>
> I have two for loops (i in 1:3, and j in 0:2).  Within the loops, I
> had been creating matrices of relevant estimation coefficents in order
> to make lots of LaTeX tables.
>
> Well, now I want to be able to combine the results of many different
> estimations from within the loops into one larger table outside the
> loops.
>
> How can I save the estimation results from each iteration of the
> estimation within a loop for later use outside the loop?
>
> Thanks,
>
> BQ
>
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>
> --
> Jim Holtman
> Cincinnati, OH
> +1 513 646 9390 (Cell)
> +1 513 247 0281 (Home)
>
> What the problem you are trying to solve?

```