Genetic Algorithm - Vectorized Mode - Reg

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Kallam Haranadha Reddy
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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回答（2 个）

Walter Roberson
Walter Roberson 2018-12-30
'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
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!

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madhan ravi
madhan ravi 2018-12-29
Your function requires only two inputs whereas you have stuffed in 3 .
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Kallam Haranadha Reddy
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.
Stephen23
Stephen23 2018-12-30
编辑：Stephen23 2018-12-30
"Your function requires only two inputs whereas you have stuffed in 3 ."
There are actually 137 inputs to InvClassifyGAFitnessFunc:
https://www.mathworks.com/help/matlab/matlab_prog/comma-separated-lists.html
Three inputs is probably the correct number, judging by this earlier thread:
https://www.mathworks.com/matlabcentral/answers/435093-genetic-algorithm-reg#answer_351648

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