Could you possibly consider reading "An Introduction to R", especially the
first few pages of chapter 5, and also a bit about vectors from chapter 2,
and maybe eventually even some other parts...

You have x[i][j] where length(i)==1, so x[i] will be a single element.
Having [j] there makes no sense except if j==1 (in that case, it makes no
difference). Why would you ask for a second element of a vector of length 1?

K


On Thu, Oct 15, 2009 at 8:23 AM, tdm <philb@philbrierley.com> wrote:

>
> Hi,
>
> Can someone please give me a pointer as to how I can set values of an
> array?
>
> Why does the code below not work?
>
> my_array <- array(dim=c(2,2))
> my_array[][] = 0
> my_array
>     [,1] [,2]
> [1,]    0    0
> [2,]    0    0
>
> for(i in seq(1,2,by=1)){
>  for(j in seq(1,2,by=1)){
>  my_array[i][j] = 5
>  }
>  }
>
> Warning messages:
> 1: In my_array[i][j] = 5 :
>  number of items to replace is not a multiple of replacement length
> 2: In my_array[i][j] = 5 :
>  number of items to replace is not a multiple of replacement length
>
>  my_array
>     [,1] [,2]
> [1,]    5    0
> [2,]    5    0
>
>
>
> --
> View this message in context:
> http://www.nabble.com/populating-an-array-tp25903190p25903190.html
> Sent from the R help mailing list archive at Nabble.com.
>
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>

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