help how can I use the PSO algorithme for the case of a matrix ?!

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Imane hammou ouali
编辑： Stephan 2019-4-10
Hello community,
I want to apply the PSO algirithme for a matrix, if someone have the matlab code or any idea or recommendation please
Thanks

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回答（1 个）

Stephan
Stephan 2019-4-9
Hi,
you can use the reshape function and take advantage of the linear indexing in Matlab. This will allow to work with matrices too.
Best regards
Stephan
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Imane hammou ouali
Imane hammou ouali 2019-4-10
well , my objective function is a matrix , and i'm searching how can i return a maximum of this matrix with a constraint predefined.
Stephan
Stephan 2019-4-10
编辑：Stephan 2019-4-10
Perhaps this helps:
>> A = [1 2 3; 4 5 6; 7 8 9]
A =
1 2 3
4 5 6
7 8 9
>> A(3)
ans =
7
%-------------------------------------------------------------
>> B = reshape(A,1,[])
B =
1 4 7 2 5 8 3 6 9
>> B(3)
ans =
7
%-------------------------------------------------------------
>> C = reshape(B,3,3)
C =
1 2 3
4 5 6
7 8 9
>> C(3)
ans =
7
--> You can give an array of size 1xn to the objective function (this is what PSO will do) and then reshape it to size ixj to perform matrix calculations inside your objective function. This works because the linear indexing and is done easily using reshape. As long as your objective function returns a scalar value as result, this will work properly.

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