[R] numbers loop in R
David Winsemius
dwinsemius at comcast.net
Fri Apr 17 19:13:25 CEST 2009
I would have expected to see the assignment to B[k,] inside the loops.
And to see some connection with the k index in the inner loops if you
did not want all of the rows to be similar. Because the assignment is
outside the loops, it happens only once.
-- David Winsemius
On Apr 17, 2009, at 11:11 AM, emj83 wrote:
>
> I would like to create a matrix in R that looks similar to this:
>
> [,1] [,2] [,3] [,4]
> [1,] NaN 1 2 3
> [2,] NaN 1 2 4
> [3,] NaN 1 2 5
> [4,] NaN 2 3 4
> [5,] NaN 2 3 5
> [6,] NaN 3 4 5
>
> I have the loop below:
>
> where A for example is 5
>
> matrixx<-function(A){
> B=matrix(NaN,nrow=(A+1),ncol=4)
> for(k in 1:(A+1)){
> for(i in 1:(A-2)){
> for(j in (i+2):A){
> }
> }
> }
> B[k,]=c(NaN,i,(i+1),j)
> print(B)
> }
>
> But it only prints the final line in:
>
>> matrixx(5)
> [,1] [,2] [,3] [,4]
> [1,] NaN NaN NaN NaN
> [2,] NaN NaN NaN NaN
> [3,] NaN NaN NaN NaN
> [4,] NaN NaN NaN NaN
> [5,] NaN NaN NaN NaN
> [6,] NaN 3 4 5
>
> Could anyone give me a hand? Would be much appreciated.
>
> Thanks Emma
>
> --
> View this message in context: http://www.nabble.com/numbers-loop-in-R-tp23099591p23099591.html
> Sent from the R help mailing list archive at Nabble.com.
>
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David Winsemius, MD
Heritage Laboratories
West Hartford, CT
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