How can I solve the error "Subscripted assignment dimension mismatch."when solving a MOOP using the gamultiobj of the matlab toolbox

Dear all;

I am trying to solve a MOOP using the Matlab global optimization toolbox. some of the parameters used in the objective functions are learned from table loaded from an excel file. when I run the code from the optimization toolbox it gives me an error "Subscripted assignment dimension mismatch." Please someone can help me about this. you can find attached the code.

[Walter Roberson]

We need some sample data (P) and the .xlsx file to test with, and we need a complete copy of the error message.

[Sobhi Barg]

Hi Walter, thank you for your comments. attached the excel file and a copy of the error. the data of P are:

lower: [1 0.45 1e-2 0.07e-3 1e-2 1] upper:[1e5 0.9 500e-2 7e-3 20000e-2 1000]

Answer 1

[Matt Cohen]

Hi Sobhi,

Thank you for providing the data and fitness function for reproducing this issue. One issue I am encountering right away when running this is that your fitness function currently returns a 2x2 matrix. Because of this, I am receiving the following error:

"Error running optimization. Your fitness function must return a scalar value."

In order to get this to eventually work, you will need to modify your fitness function so that it returns a scalar value instead of a matrix. I do not know more about the specific problem or fitness function you are working with, so I cannot provide much help in terms of how to fix this. Hopefully this at least points you in the right direction.

- Matt