MATLAB Answers

Options in Genetic Algorithm don't work

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Luigi Treccozzi
Luigi Treccozzi on 10 Feb 2018
Commented: Kevy Pontes on 22 Jan 2021
When I try to run this code: options = optimoptions('ga','CrossoverFcn',@mycrossover); Matlab gives me this Error: Error using optimoptions (line 124) Invalid solver specified. Provide a solver name or handle (such as 'fmincon' or @fminunc). Type DOC OPTIMOPTIONS for a list of solvers.
I have no idea what that means. Please help. How do I set options parameters?

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Answers (4)

Suraj Mankulangara
Suraj Mankulangara on 22 Feb 2018
Hello Luigi
The optimoptions() function is part of the Optimization Toolbox, which is different from the Global Optimization Toolbox, (which provides the genetic algorithm solver) in MATLAB (you can refer to the top left corner in the doc links below to see which toolbox a function belongs to):
It is likely that this error occurs because you don't have either of the toolboxes installed.
To check which toolboxes are installed in your MATLAB, type
ver
at the MATLAB command window.

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Ahmad Rizqullah Abdul Malek
I got this exact error too running someone else's code. The code could finally run after I installed "Global Optimization Toolbox" as an add-on for Matlab.
Go on the "Apps" tab on Matlab > "Get More Apps" > Search for "Global Optimization Toolbox" (make sure you Clear Filter first) > Install it
Run the code and it should work aye.

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Israel Vargas-Cruz
Israel Vargas-Cruz on 2 Apr 2020
Error using optimoptions (line 124)
Invalid solver specified. Provide a solver name or handle (such as 'fmincon' or @fminunc).
Type DOC OPTIMOPTIONS for a list of solvers.
Error in Genetic_Optimization (line 6)
options =
optimoptions('ga','PopulationSize',100,'Display','iter','UseParallel',true,'MaxStallGenerations',10,'PlotFcn',
@gaplotbestf);

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Kevy Pontes
Kevy Pontes on 20 Jan 2021
Hello,
I've got the same error for Genetic algorithm [Error: Error using optimoptions (line 124) Invalid solver specified. Provide a solver name or handle (such as 'fmincon' or @fminunc). Type DOC OPTIMOPTIONS for a list of solvers.] with the following toolboxes installed:
MATLAB Version 8.5 (R2015a)
Simulink Version 8.5 (R2015a)
Control System Toolbox Version 9.9 (R2015a)
Data Acquisition Toolbox Version 3.7 (R2015a)
Fixed-Point Designer Version 5.0 (R2015a)
Fuzzy Logic Toolbox Version 2.2.21 (R2015a)
Global Optimization Toolbox Version 3.3.1 (R2015a)
Image Acquisition Toolbox Version 4.9 (R2015a)
Image Processing Toolbox Version 9.2 (R2015a)
Instrument Control Toolbox Version 3.7 (R2015a)
Neural Network Toolbox Version 8.3 (R2015a)
Optimization Toolbox Version 7.2 (R2015a)
Partial Differential Equation Toolbox Version 2.0 (R2015a)
Signal Processing Toolbox Version 7.0 (R2015a)
SimPowerSystems Version 6.3 (R2015a)
Simscape Version 3.13 (R2015a)
Statistics and Machine Learning Toolbox Version 10.0 (R2015a)
Symbolic Math Toolbox Version 6.2 (R2015a)
System Identification Toolbox Version 9.2 (R2015a)
Wavelet Toolbox Version 4.14.1 (R2015a)
Any guesses???
Thanks

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Alan Weiss
Alan Weiss on 21 Jan 2021
According to the release notes, optimoptions was introduced to Global Optimization Toolbox solvers in R2016a.
Alan Weiss
MATLAB mathematical toolbox documentation
Kevy Pontes
Kevy Pontes on 22 Jan 2021
Thanks, Alan.
It worked with gaoptimset.
Regards

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