Can not get the optimal solution

[LIESEA LEUNG]

Dear Johan,

        I write a simple optimal question, but the solution is not the optimal solution.  In the COST matrix, the 22 is the lowest number. But in the solution, corresponding variable matrix(Pg_pieces) position is 0, obviously it is not the optimal solution.

        The code are in the attachment. Thanks for your help!

[Johan Löfberg]

you probbly intended Pg_pieces = sdpvar(6,6,'full');

[LIESEA LEUNG]

Thanks! After adding the 'full', it could get the optimal solution. And I would like to ask that what's difference between adding the 'full' to sdpvar and not adding.

[Johan Löfberg]

https://yalmip.github.io/tutorial/basics/