setting-up input variable in genetic algorithm

How can I set up an input variable in my ga that varies from 1 to 2 with steps of 0,1?

The results of my ga has too many significant digits after comma ( precisely 4).

Thank you

[Walter Roberson]

If you are seeing exactly 4 significant digits, chances are that you have

format short

in effect, and that you would see more digits if you used

format long g

Answer 1

[Alan Weiss]

You need to use Mixed Integer ga Optimization in one of several ways.

• Internally to your objective function, change your integer variable x to x/10. Or,
• Make a list of allowable values in a variable indexvar. Have your objective function evaluate indexvar(x), where x is your integer-valued variable. This is more flexible, in that you can have any list of allowable values.

See Solving a Mixed Integer Engineering Design Problem Using the Genetic Algorithm and in particular the section Add Discrete Non-Integer Variable Constraints.

Alan Weiss

MATLAB mathematical toolbox documentation

Answer 2

[Shiva Kalyan Diwakaruni]

Hi,

You can try using optimoptions for genetic algorithm where you can many options for passing extra parameters either in form of variables or a user defined function.

please refer the below link for more information on optimoptions for ga function

https://www.mathworks.com/help/gads/genetic-algorithm-options.html

below is the link to see how we can pass extra paramters for customization of ga function

https://www.mathworks.com/help/optim/ug/passing-extra-parameters.html

hope it helps,

thanks

[Ful0]

Hi,

thank you so much for your answer.

I'm yet not able to find a way to set up the option I need for my problem.

How can I set up a step of 0,1 in the output? through PopulationType:custom?

Thank you