Take a look at 'outer' and vectorized your function. Also look at
'expand.grid'.
On Sunday, November 27, 2011, Sachinthaka Abeywardana <
sachin.abeyward...@gmail.com> wrote:
> Hi All,
>
> I want to do something along the lines of:
> for (i in 1:n){
> for (j in 1:n){
> A[i,j]<-myfunc(x[i], x[j])
> }
> }
>
> The question is what would be the most efficient way of doing this. Would
> using functions such as sapply be more efficient that using a for loop?
>
> Note that n can be a few thousand. Thus atleast a 1000x1000 matrix.
>
> Thanks,
> Sachin
>
> [[alternative HTML version deleted]]
>
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> PLEASE do read the posting guide
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> and provide commented, minimal, self-contained, reproducible code.
>
--
Jim Holtman
Data Munger Guru
What is the problem that you are trying to solve?
Tell me what you want to do, not how you want to do it.
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