[R] permutations function

[lamack lamack]

Dear all

If I consider

d<- c(1,2,3,4)
N<- 4
n<- 2
out1<- matrix(0,N^n,n)
z<-1

for(i in 1:N)
{
for(j in 1:N)
{
   out1[z,1] = d[i]
   out1[z,2] = d[j]
   z<- z+1
}
}

library(gregmisc)
out2<- permutations(N,n,d,T,T)

I have that out1==out2. Ok

Now, if I consider

d<- c(1,2,3,4)
N<- 4
n<- 3
out1<- matrix(0,N^n,n)
z<-1

for(i in 1:N)
{
for(j in 1:N)
{
  for(k in 1:N)
  {
    out1[z,1] = d[i]
    out1[z,2] = d[j]
    out1[z,3] = d[k]
   z<- z+1
  }
}
}

out2<- permutations(N,n,d,T,T)

I have that out1 is not equal out1.

My question is: Why out1 is not equal out2 ?

Best regards