Arrays have incompatible sizes for this operation error
3 vues (au cours des 30 derniers jours)
Afficher commentaires plus anciens
Hello i am working on an optimization problem where i have 2 dec. variables x and y. x is a matrix with dimensions 36x36 and y is 36x1. my objective function only uses one of the variables which is x. but since my number of variables is 1332= (1296 +36). Now my objective function gives this error. Arrays have incompatible sizes for this operation error.
Here is my objective function looks like ;
function z = objectivefunc(x,rij,ai)
z= (-1)*sum(x.*rij.*ai,'all');
end
rij and ai are my parameters. (rij 36x36, ai 36x1 ).
Thank you in advance.
0 commentaires
Réponses (2)
Alan Weiss
le 8 Avr 2022
It looks like the issue is that ai is not 36-by-36. You probably want something like
ai = repmat(ai,1,36);
z= (-1)*sum(x.*rij.*ai,'all');
Alan Weiss
MATLAB mathematical toolbox documentation
1 commentaire
Alan Weiss
le 8 Avr 2022
You are mixing up the two approaches, problem-based and solver-based. You cannot do that. You have x and y defined as optimization variables. That is fine. You cannot call ga on a problem with optimization variables; you have to call solve.
Also, I am not familiar with prob2matrices. Did you mean prob2struct? In any case, I think that you should stick with the problem-based approach in order to keep the variables x and y separated, not shoved together into one long, hard-to-understand variable.
Alan Weiss
MATLAB mathematical toolbox documentation
2 commentaires
Voir également
Catégories
En savoir plus sur Surrogate Optimization dans Help Center et File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!