Error ! All rows in the bracketed expression must have the same number of columns.

I am using yalmip to write an LMI in matlab but its giving an error kindlay help if anyone know the solution. My code is like this

clc;
A1=[-1.1 0.4;-0.2 1.1];
A2=[-0.2 0.7;0.6 1.3];
B1=[0;1.2];
B2=[0;1.3];
Bw1=[0;0.12];
Bw2=[0;0.9];
G1=[1;0];
G2=[1;0];
ohm=0.7;

   yalmip('clear')

Q= sdpvar(2,2,'symmetric');
del=sdpvar(1,1,'full');
U=sdpvar(2,2,'full');
Y11= sdpvar(1,2);
Y21= sdpvar(1,1);

LMI1 = blkvar();

LMI1(1,1)=-Q;
LMI1(1,2)=A1*U+B1*Y11;
LMI1(1,3)=G1*del+B1*Y21;
LMI1(1,4)=Bw1;

LMI1(2,2)=Q-U-U';
LMI1(2,3)=U'*ohm;
LMI1(2,4)= 0;

LMI1(3,3)=-2*del;
LMI1(3,4)=0;

LMI1(4,4)=-eye(2);

error==>> lmi1= sdpvar(LMI1);

[Johan Löfberg]

BTW, YALMIP questions are much better asked on the YALMIP forum

https://groups.google.com/forum/?fromgroups=#!forum/yalmip

Answer 1

[Johan Löfberg]

Your blocks makes no sense. The (1,4) block is 2x1, but the (4,4) is 2x2, hence inconsistent width.

[Ahmad Sheikh]

yeah john you are right actually i am bit worried how they defined this LMI in this paper ...

Control of Nonlinear Discrete-time Systems Subject to Energy Bounded Disturbances Using Local T-S Fuzzy Models

i-e equation (18)....I think there is some mistake or error they have done...!