[R] help with executing instruction every i-th run of loop

[Duncan Murdoch]

On 5/17/2007 10:56 AM, Mark W Kimpel wrote:
> I am running a very long loop and would like to save intermediate 
> results in case of a system or program crash. Here is the skeleton of 
> what my code would be:
> 
> for (i in 1:zillion)
>    {
>     results[[i]]<-do.something.function()
>     if (logical.test(i)) {save(results, "results.tmp")}
>    }
> 
> logical.test would test to see if i/1000 has no remainder. What R 
> function would test that?

(i %% 1000) == 0

Duncan Murdoch