Hi Frederik,
There is no need for the double for loop:
b[,5] <- sin(runif(5,0,2*pi))
As to your question, check the values i and k take. In the first
iteration of the second loop k == 0, and R does not support an index
equal to 0. The problem is in 1:n-1, this gives 0- 4, in stead do
1:(n-1). Better is to skip the double for loop altogether and vectorization.
cheers,
Paul
frederik vanhaelst wrote:
Hi,
I want put some values in the last column of a matrix b. But every time
again there comes the same error on the screen...
b <- array(0, c(5,5))
m<-matrix(runif(20,0,2*pi),5) # the sinus of this kind of values i
want put in the last column of b, m is a 5*4 matrix
n<-5
for(i in 1:n){
+ a2<-1
+ for(k in 1: n-1){
+ a2<-a2*sin(m[i,k])
+ }
+ b[i,n]<-a2
+ }
Error in b[i, n] <- a2 : replacement has length zero
Is there someone who see the problem?
Thanks a lot,
Frederik
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