numbers loop in R
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