how can i make ga code to set a specific values to a parameter

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zenhom mohamed 2018-11-25

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回答： Alan Weiss 2018-11-27

hallo, i am making optimization by genetic algorithm (ga)...i know that when you run the code, random values for each parameter are assumed..my question: if there is a parameter i want the code to assume a specific values to it at each iter?

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Answer 1

Star Strider 2018-11-25

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I am not certain what you are asking.

If you have a parameter you want not to vary (you already know the optimum value), fix it in your fitness function, and optimise the other parameters you want to estimate. This is likely more efficient than fixing it with the ‘lb’ and ‘ub’ arguments, alghtough if you want it to vary only within a narrow range, you can use those arguments to constrain it.

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zenhom mohamed 2018-11-27

thank you for your answer @star strider

i mean that: if x(1) represents a size of a generator which takes a specific values according to the manifacture (for ex. 50, 100, 150 kw only), i want the ga code not to set any random value for x(1), i want it to set one value of these three values at each iteration

Star Strider 2018-11-27

My pleasure.

Set ‘x(1)’, and whatever other parameters you want not to vary, to constant values in your fitness function, and do not include them in the parameters you want to optimise.

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