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[geoffreyp]

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[damlakomurcu]

Hello,
I try to implement an MOEAD optimization problem. First, I test with the code below to see that i am implementing in a correct way.
https://github.com/moead-framework/framework/blob/master/example_rmnk_moead.py

But results are negative values like in the below. I think it is supposed to be between 0 and 1 like values in the instance file under ‘p tables’

array([[-0.59936725, -0.57269817],
[-0.5901797 , -0.5875232 ],
[-0.60340434, -0.57064142],
[-0.52539518, -0.66643273],
[-0.60579211, -0.56613425],
[-0.56925268, -0.62854604],
[-0.5957098 , -0.58578932],
[-0.59560659, -0.58704566],..

Could you help me about this issue? It is very important for me.

What did i miss?

Thank you.

[geoffreyp]

Hello,

The RMNK problem is a maximization problem with results of the evaluation function between 0 and 1. The MOEAD framework supports only minimization problems, so in the implementation of the problem, I multiply the result by -1 (https://github.com/moead-framework/framework/blob/82e437678f5d54a13a71b8a97fa9a45cb6ec4685/moead_framework/problem/combinatorial/rmnk.py#L138C1-L138C36).

You can find more information here : https://moead-framework.github.io/framework/html/tuto.html#tuto-problem