[R] Looping over subsets

[jim holtman]

Can you provide an example of what you would like to do.  Show what a
full set (on a small scale would be) and then how you would select the
subsets and then what type of processing you would like to do (PLEASE
do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.)

On 20 Jan 2008 06:53:45 +0000, Z. Fang <zf216 at cam.ac.uk> wrote:
> Hi,
>
> Possibly a dumb question, but I wonder if anyone can help me with this.
> What I want to do, essentially, is to loop over all ordered subsets of a
> given size of a certain set. Ultimately, the idea is to find the subset
> that maximises a certain value.
>
> The set in question is likely large (the subset size is likely small,
> though), so things like combn don't seem to be a good solution. The biggest
> concern is keeping memory usage sane, but processing time is also fairly
> important.
>
> Any ideas?
>
> Zhou Fang
>
> ______________________________________________
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> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
>



-- 
Jim Holtman
Cincinnati, OH
+1 513 646 9390

What is the problem you are trying to solve?