[R] loop over matrix: subscript out of bounds

Eric Berger er|cjberger @end|ng |rom gm@||@com
Mon Aug 6 11:24:14 CEST 2018


Both loops are on 'i', which is a bad idea. :-)
Also myMatrix[i,i+1] will be out-of-bounds if i = ncol(myMatrix)


On Mon, Aug 6, 2018 at 12:02 PM, Maija Sirkjärvi <maija.sirkjarvi using gmail.com>
wrote:

> I have a basic for loop with a simple matrix. The code is doing what it is
> supposed to do, but I'm still wondering the error "subscript out of
> bounds". What would be a smoother way to code such a basic for loop?
>
> myMatrix <- matrix(0,5,12)
> for(i in 1:nrow(myMatrix)) {
>   for(i in 1:ncol(myMatrix)) {
>     myMatrix[i,i] = -1
>     myMatrix[i,i+1] = 1
> }}
> print(myMatrix)
>
> Thanks in advance!
>
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