Inverse and identity matrix

Given. A=[1 2 3;6 7 8;11 12 13]; B=[4 5 6;9 10 11;14 15 16]; and C=-inv(A)*B/eye(3). And the C matrix is

C =

     4     8     8
     0     0    -8
     0     0     4

The size of C matrix must be 6x3.But I only got 3x3. Why does it happen?

Answer 1

[John D'Errico]

It happens because of the basic rules of those matrix operators.

All of your matrices are 3x3. Both of those binary operations (* and /) between 3x3 matrices result in another 3x3 matrix.

My guess is you have invented in your mind a new rule for the / operator, wherein it becomes a matrix concatenation operator, or something like that. Sorry, but operators have explicit definitions in MATLAB. They follow their defined behaviors, as I would hope they should.

[nur yusof]

Ok.Noted.Can you give me one example how to do it?