Genetic Algorithm - Vectorized Mode - Reg

Question

Kallam Haranadha Reddy 2018-12-29

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编辑： Stephen23 2018-12-30

'Position' is a (68,6) array of doubles representing the population of Genetic algorithm. 'classGA1 ' is a (68,1) cell array of the type of population class ( inventory class A,B or C) . 'ClassDM1 ' is a (68,1) cell array of the inventory class(A,B, or C)given by the decision maker (materials manager).

[Fitness] = InvClassifyGAFitnessFunc(Position,classGA1,ClassDM1);

is the Fitness is a (68,1) double array determining the fitness of population.

I want to operate the GA in vectorized mode.

[Fitness] = @(Position)InvClassifyGAFitnessFunc(Position(':',1:6),classGA1{':',1},ClassDM1{':',1});
% vff = @(Position) InvClassifyGAFitnessFunc(Position(':',1:6), classGA1{':'},CDM1{':'});
 A=[0,0,0,0,-1,1];
 b=[0];
 Aeq=[1,1,1,1,0,0];
 beq=[1];
 lb=[0,0,0,0,0,0];
 ub=[1,1,1,1,1,1];
 options= gaoptimset('PlotFcn',@gaplotbestf,'Vectorized','on');
 [x,fval]=ga(Fitness,6,A,b,Aeq,beq,lb,ub,[],options);
 
 

The genetic algorithm is giving the error message

Error using InvClassifyGAFitnessFunc

Too many input arguments.

How to run my genetic algorithm in vectorized mode.

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Answer 1

Walter Roberson 2018-12-30

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https://ww2.mathworks.cn/matlabcentral/answers/437558-genetic-algorithm-vectorized-mode-reg#answer_354394

在 MATLAB Online 中打开

'classGA1 ' is a (68,1) cell array of the type of population class

When that is the case, then

classGA1{':',1}

expands into 68 different arguments, equivalent to classGA1{:}

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Stephen23 2018-12-30

编辑：Stephen23 2018-12-30

@madhan ravi: indexing using parentheses, curly braces, etc, is just a convenience notation for subsref. You can see examples in its help:

https://www.mathworks.com/help/matlab/ref/subsref.html

And also some threads on this forum, showing how this is useful:

https://www.mathworks.com/matlabcentral/answers/422001-changing-dimension-in-a-loop

https://www.mathworks.com/matlabcentral/answers/367188-how-to-filter-an-n-d-array-with-matrix-indexing

https://www.mathworks.com/matlabcentral/answers/344486-generate-comma-separated-list-in-single-line-of-code

This is also why those tutors who give assignments which boldly state "inbuilt functions cannot be used" really are making life very hard for their pupils!

madhan ravi 2018-12-30

Thank you!

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Answer 2

madhan ravi 2018-12-29

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https://ww2.mathworks.cn/matlabcentral/answers/437558-genetic-algorithm-vectorized-mode-reg#answer_354293

Your function requires only two inputs whereas you have stuffed in 3 .

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Kallam Haranadha Reddy 2018-12-30

i combined the two input arguments to the fitness function into a single argument and ran the GA. but the same error message too many input arguments in the fitness function is coming.