Matrix multiplication problem

[Florian Brunner]

Hello Johan,

I get strange errors when multiplying sdp-variables and numerical vectors in a certain order.

 a=sdpvar(1,2);
 (a*ones(2,1))*eye(2);

produces the error
Error using  *
Inner matrix dimensions must agree.

Error in sdpvar/addrightfactor (line 4)
        X.rightfactors{i} = X.rightfactors{i}*R;

Error in sdpvar/mtimes (line 495)
                Z = addrightfactor(Z,Y);

However

a=sdpvar(2,1);
(ones(1,2)*a)*eye(2);

works fine.


Cheers,

Florian

[Johan Löfberg]

Thank you for reporting

edit  sdpvar/addrightfactor and replace

X.rightfactors{i} = X.rightfactors{i}*R;

with

try

 X.rightfactors{i} = X.rightfactors{i}*R;

catch
 X = flush(X);
end