I want to repeat each element of 3x3 matrix to make it 9x9. There is a direct function repelem in Matlab2015, but i am using older version.
How to perform this task manually?
Asked
Active
Viewed 498 times
0
-
repmat will repeat the entire matrix, but here i want to repeat each element of matrix. – abhishek Nov 24 '17 at 20:18
-
Thanks for encouragement. I am trying this. Here i need to put repmat output for each element in a loop to get desired matrix. – abhishek Nov 24 '17 at 20:23
-
Kindly help me in loop formation. – abhishek Nov 24 '17 at 20:28
1 Answers
0
You can use the kron(A,B) function. It was introduced before R2006a so you should have it in R2014. This function calculates the Kronecker Tensor Product. It multiplies each element of matrix A with the full matrix B and thus creating a bigger matrix. For example,
>> A = magic(3)
A =
8 1 6
3 5 7
4 9 2
>> B = ones(3)
B =
1 1 1
1 1 1
1 1 1
>> C = kron(A,B)
C =
8 8 8 1 1 1 6 6 6
8 8 8 1 1 1 6 6 6
8 8 8 1 1 1 6 6 6
3 3 3 5 5 5 7 7 7
3 3 3 5 5 5 7 7 7
3 3 3 5 5 5 7 7 7
4 4 4 9 9 9 2 2 2
4 4 4 9 9 9 2 2 2
4 4 4 9 9 9 2 2 2