try this: (you were trying to index with non-integer numbers)


run_rows<-seq(0,1,0.05)
run_cols<-seq(0.3,0.6,0.05)

res<-matrix(NA,length(run_rows),length(run_cols))

for(i in 1:length(run_rows))
{
    for(j in 1:length(run_cols))
    {
        res[i,j] = run_rows[i] + run_cols[j]
        #niether the above, nor res[[i,j]]=i+j work, why?
    }
}





On 12/5/05, Serguei Kaniovski <kaniovsk@wifo.ac.at> wrote:
>
> Hi, I have a more complex example, but the problem boils down to this
> FOR-loop not filling in the res-matrix
>
> run_rows<-seq(0,1,0.05)
> run_cols<-seq(0.3,0.6,0.05)
>
> res<-matrix(NA,length(run_rows),length(run_cols))
>
> for(i in run_rows)
> {
>     for(j in run_cols)
>     {
>         res[i,j]=i+j
>         #niether the above, nor res[[i,j]]=i+j work, why?
>     }
> }
>
> Thank you,
> Serguei
>
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Jim Holtman
Cincinnati, OH
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