# Why does my function abc give error with optimtool

1 visualizzazione (ultimi 30 giorni)
Sadiq Akbar il 12 Lug 2022
Modificato: Sadiq Akbar il 14 Lug 2022
I have a function file abc. I want to run it with optimtool ga. I do settings in the Optimtool as below:
Solver: ga-Genetic Algorithm
Fitness function: @abc
Number of variable 6
Bounds Lower: [0 0 0 0 0 0] Upper:[180 180 180 180 180 180]
-----------------------------
After running it, it gives the following error:
Optimization running.
Error running optimization.
Incorrect dimensions for matrix multiplication. Check that the number of columns in the first matrix matches the number of rows in the second matrix. To perform elementwise multiplication, use '.*'.
##### 0 CommentiMostra -2 commenti meno recentiNascondi -2 commenti meno recenti

Accedi per commentare.

### Risposta accettata

Torsten il 12 Lug 2022
The product r*k in the line
A = exp(-1j*r*k);% Steering matrix
is not defined.
k is (3x3), r is (Nx3) where N = 10.
Setting N = 3 would make the product to be defined.
##### 6 CommentiMostra 4 commenti meno recentiNascondi 4 commenti meno recenti
Sadiq Akbar il 14 Lug 2022
Thank you very much dear Torsten for your help. But now there is one issue. When I keep the bounds as:
Lower=[0;0;0;0;0;0] Upper=[360;360;360;180;180;180]
It gives wrong results. But when I change them to:
Lower=[0;0;0;0;0;0] Upper=[180;180;180;180;180;180]
then it gives good results. Although the actual range is the 1st case. So what do I do now?
Torsten il 14 Lug 2022
I have no experience with ga.
If your problem is such that you can use "fmincon" or some other deterministic optimizer instead of ga, you should do so.

Accedi per commentare.

### Categorie

Scopri di più su Problem-Based Optimization Setup in Help Center e File Exchange

### Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by