I am having a problem with matrix dimension

Hello,

I guess the problem is with y (line 147) as its not taking value from section %% output y.

Answer 1

[Jan]

Your y and yref are defined as globals, but they do not get a value anywhere. Therefore I get this error message running your code:

A1*x + B*(u)*x + Gv
Error using  * 
Incorrect dimensions for matrix multiplication. Check that the number of
columns in the first matrix matches the number of rows in
the second matrix. To perform elementwise multiplication, use '.*'.

because u is the empty matrix.

This is the typical debugging horror, if you use global variables. Avoid this bad programming practice to get maintainable code.