Hi Volkan,
I am not being sarcastice, just a suggetion, i think you should go through the basics of state space modeling. for better understanding.
Looking at the matrices in the code, i drive following.
Sizes of matrices... A = 3*3, B = 3*2; C = 5*3, and D = 5*2;
Now state space equtions are
diff(x) = Ax+Bu
y = Cx+Du;
So from second equation you can see dimentions of C and D decide the number of outputs you are generating. Mutiplication of C with x with give you 5*3*3*1 = 5*1 and so will multiplication of D and u i.e. Du = 5*2*2*1 = 5*1.
So the output you are getting is correct.
Note: From your comments i get impresstion that you think, outputs will be the size of input vector but that's not true. One input can generate multiple outputs, it simply depends upon the design of your system.
Cheers,
Deepak
