ga algorithm with vectors

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function y=funcion(d)
y=(2*(pi*(d(1)^2)/4))+(d(2)*(pi*(d(3)^2)/4))
%d(1)=[ 6 8 10 12], d(3)=[ 6 8 10 12], round(d(2))
y=570;
end
fit=@(d)funcion(d)
nvars=3; 
[d,fval]=ga(fit,nvars)

How to solve a function through ga algortihm, if you have 3 variables, and two of them must be choosen between the numbers of a vector, and the third variable must be entire number?

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Answer 1

Stephan 2019-2-12

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Hi,

check this example in the documentation:

https://de.mathworks.com/help/gads/solving-a-mixed-integer-engineering-design-problem-using-the-genetic-algorithm.html.

It is about integer variables and in the second section there is shown how to choose values for variables from a vector of given discrete values.

Best regards

Stephan

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J.J 2019-2-12

Thanks, but I don't understand how to write it in options of ga, the way to choose values for variables from a vector, in other words, I don't understand how I must write the function, because for example d(1) and d(3) must be choosen between [6 8 10 12] and d(2) must be an entire number, and with these features y must be near to 570.

How can I do it this?

Thank you.

Stephan 2019-2-12

Did you recognize this section of the example:

https://de.mathworks.com/help/gads/solving-a-mixed-integer-engineering-design-problem-using-the-genetic-algorithm.html#d120e19422

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ga algorithm with vectors

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