Method one: eye and kron:
>> n = 5;
>> j = 6;
>> M = kron(-eye(j),ones(n,1))
M =
-1 0 0 0 0 0
-1 0 0 0 0 0
-1 0 0 0 0 0
-1 0 0 0 0 0
-1 0 0 0 0 0
0 -1 0 0 0 0
0 -1 0 0 0 0
0 -1 0 0 0 0
0 -1 0 0 0 0
0 -1 0 0 0 0
0 0 -1 0 0 0
0 0 -1 0 0 0
0 0 -1 0 0 0
0 0 -1 0 0 0
0 0 -1 0 0 0
0 0 0 -1 0 0
0 0 0 -1 0 0
0 0 0 -1 0 0
0 0 0 -1 0 0
0 0 0 -1 0 0
0 0 0 0 -1 0
0 0 0 0 -1 0
0 0 0 0 -1 0
0 0 0 0 -1 0
0 0 0 0 -1 0
0 0 0 0 0 -1
0 0 0 0 0 -1
0 0 0 0 0 -1
0 0 0 0 0 -1
0 0 0 0 0 -1
Method two: eye and repelem:
>> M = repelem(-eye(j),n,1)
M =
-1 0 0 0 0 0
-1 0 0 0 0 0
-1 0 0 0 0 0
-1 0 0 0 0 0
-1 0 0 0 0 0
0 -1 0 0 0 0
0 -1 0 0 0 0
0 -1 0 0 0 0
0 -1 0 0 0 0
0 -1 0 0 0 0
0 0 -1 0 0 0
0 0 -1 0 0 0
0 0 -1 0 0 0
0 0 -1 0 0 0
0 0 -1 0 0 0
0 0 0 -1 0 0
0 0 0 -1 0 0
0 0 0 -1 0 0
0 0 0 -1 0 0
0 0 0 -1 0 0
0 0 0 0 -1 0
0 0 0 0 -1 0
0 0 0 0 -1 0
0 0 0 0 -1 0
0 0 0 0 -1 0
0 0 0 0 0 -1
0 0 0 0 0 -1
0 0 0 0 0 -1
0 0 0 0 0 -1
0 0 0 0 0 -1
>> C = {-ones(n,1)};
>> M = blkdiag(C{ones(1,j)})
M =
-1 0 0 0 0 0
-1 0 0 0 0 0
-1 0 0 0 0 0
-1 0 0 0 0 0
-1 0 0 0 0 0
0 -1 0 0 0 0
0 -1 0 0 0 0
0 -1 0 0 0 0
0 -1 0 0 0 0
0 -1 0 0 0 0
0 0 -1 0 0 0
0 0 -1 0 0 0
0 0 -1 0 0 0
0 0 -1 0 0 0
0 0 -1 0 0 0
0 0 0 -1 0 0
0 0 0 -1 0 0
0 0 0 -1 0 0
0 0 0 -1 0 0
0 0 0 -1 0 0
0 0 0 0 -1 0
0 0 0 0 -1 0
0 0 0 0 -1 0
0 0 0 0 -1 0
0 0 0 0 -1 0
0 0 0 0 0 -1
0 0 0 0 0 -1
0 0 0 0 0 -1
0 0 0 0 0 -1
0 0 0 0 0 -1
Best Answer