[R] What is wrong with this FOR-loop?

[Dimitris Rizopoulos]

your indexing is wrong; another way to achieve the same result is

outer(run_rows, run_cols, "+")


I hope it helps.

Best,
Dimitris

----
Dimitris Rizopoulos
Ph.D. Student
Biostatistical Centre
School of Public Health
Catholic University of Leuven

Address: Kapucijnenvoer 35, Leuven, Belgium
Tel: +32/(0)16/336899
Fax: +32/(0)16/337015
Web: http://www.med.kuleuven.be/biostat/
     http://www.student.kuleuven.be/~m0390867/dimitris.htm


----- Original Message ----- 
From: "Serguei Kaniovski" <kaniovsk at wifo.ac.at>
To: <r-help at stat.math.ethz.ch>
Sent: Monday, December 05, 2005 12:47 PM
Subject: [R] What is wrong with this FOR-loop?


> 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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