MATLAB: Setting-up input variable in genetic algorithm

Question

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

Answer 1

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