Re: [R] populating an array

R doesn't access arrays like C, use [i,j] to access a 2-d array, e.g.: my_array <- array(0,dim=c(2,2)) for(i in seq(1,2,by=1)){ + for(j in seq(1,2,by=1)){ + my_array[i,j] = i+j + } + } my_array [,1] [,2] [1,]23 [2,]34 tdm wrote: Hi, Can someone please give m

Re: [R] populating an array

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

Re: [R] populating an array

On Wed, 14 Oct 2009, tdm wrote: Hi, Can someone please give me a pointer as to how I can set values of an array? See ?Subscript and study the examples. What do you suppose array( 1:4, dim=c(2, 2) )[1][2] is? R is not C. HTH, Chuck Why does the code below not work

[R] populating an array

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,]00 [2,]00 for(i in seq(1,2,by=1)){ for(j in seq(1,2,by=1)){ my_array[i][j] = 5 } }