Hello,

I want to create a matrix of N random numbers with a uniform distributions. Later, I want to repeat T times each row of this matrix. For this I do the following loop:

N<-45
T<-10
n<-N*T
a<-matrix(runif(N,min=-1,max=1),nr=N)

mymat<-matrix(rep(NA,n),nr=n,nc=1)
for(i in i:N){
b<-rep(a[i,],T)
mymat[i,]<-b
}

Mi problem is that with this loop I can see the output of the loop but I canot get the matrix (mymat) that contains the full output of the loop.

Please, somebody know how can I create a matrix that contains the output of the loop with a dimension NTx1 (450x1).

Thanks a lot for your help.
Alexandra

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