MATLAB GA error help!

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joichiro nishi 2018-12-5

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https://ww2.mathworks.cn/matlabcentral/answers/433899-matlab-ga-error-help

评论： Walter Roberson 2018-12-6

Note: Updated the files and error message

Like the Subject says, I need help in sorting out the errors. Basically I'm trying to find the optimal bidding coefficients bd with the purpose of enhancing the profit F for the 2nd player (the 2 in Custom_Fitness_Fcn). Now the problem is that whenever I try to run main I get these errors:

>> main
In an assignment  A(:) = B, the number of elements in A and B must be the same.
Error in Custom_Constraint_Fcn (line 10)
P(n) = (R-ac(n))/bd(n);
Error in main>@(bd)Custom_Constraint_Fcn(ac,bd,limit,i,l,Q0,K)
Error in createAnonymousFcn>@(x)fcn(x,FcnArgs{:}) (line 11)
fcn_handle = @(x) fcn(x,FcnArgs{:});
Error in constrValidate (line 21)
            [tmpCineq,tmpCeq] = nonlcon([Iterate.x Iterate.x]');
Error in gacommon (line 125)
[LinearConstr, Iterate,nineqcstr,neqcstr,ncstr] = constrValidate(NonconFcn, ...
Error in ga (line 336)
    NonconFcn,options,Iterate,type] = gacommon(nvars,fun,Aineq,bineq,Aeq,beq,lb,ub, ...
Error in main (line 9)
[bd,F] = ga(FitnessFcn,nvars,[],[],[],[],[],[],ConstraintFcn,options);
Caused by:
    Failure in initial user-supplied nonlinear constraint function evaluation.
 
>> 

I've been trying to debug this thing for days, and I really need it in less than 2. Somebody please help!

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joichiro nishi 2018-12-5

编辑：joichiro nishi 2018-12-5

在 MATLAB Online 中打开

>Your custom create function internally creates aa matrix of values. It extracts column 2 and transposes. The result is a single row . Therefore your population size is 1.

Yes, I want this particular column to be transformed into a row vector. I need this to be an 1 x 8 row vector though, but it keeps on giving me a 2 x 1 column vector instead with the breakpoint at the first executable of the constraint like in the image above.

>by the way the second parameter that ga passes to the create function is the fitness function . Your anonymous wrapper calls thar objective function and ignores it and passes fitness function in to your custom function . Which ignores it anyhow .

I've fixed it. I could've sworn I cleared that out; must be the 12 hour shifts taking their toll. But anyway, since, editing those (all of the m files) the subscript mismatch has turned into :

In an assignment A(:) = B, the number of elements in A and B must be the same.

I still think its related to bd not being the expected row vector size. Thoughts?

joichiro nishi 2018-12-5

在 MATLAB Online 中打开

MATLAB.zip

I've removed the creation function, and just coded an initial population. Now the problem is that a similar error occurs:

Error using vertcat
Dimensions of matrices being concatenated are not consistent.
Error in Custom_Constraint_Fcn (line 21)
c = [Gen_Limit_max; Gen_Limit_min; Lod_Limit_max; Lod_Limit_min];  %generates a column vector of nonlinear
constraints
Error in main>@(bd)Custom_Constraint_Fcn(ac,bd,limit,i,l,Q0,K)
Error in createAnonymousFcn>@(x)fcn(x,FcnArgs{:}) (line 11)
fcn_handle = @(x) fcn(x,FcnArgs{:});
Error in constrValidate (line 21)
            [tmpCineq,tmpCeq] = nonlcon([Iterate.x Iterate.x]');
Error in gacommon (line 125)
[LinearConstr, Iterate,nineqcstr,neqcstr,ncstr] = constrValidate(NonconFcn, ...
Error in ga (line 336)
    NonconFcn,options,Iterate,type] = gacommon(nvars,fun,Aineq,bineq,Aeq,beq,lb,ub, ...
Error in main (line 10)
[bd,F] = ga(FitnessFcn,nvars,[],[],[],[],[],[],ConstraintFcn,options);
Caused by:
    Failure in initial user-supplied nonlinear constraint function evaluation.
 
>> 

Putting a breakpoint right at the very beginning of the constraint function yields a 2x8 size for bd. I suspect this has something to do with the 8x2 size limit() as in the matrix, but for the life of me I can't think of a fix.

bd:

0.0137725212504241	0.0612786475132243	0.161591023828413	0.0306411601964610	0.0911091201633450	0.0915716761288406	0.0489777513108497	0.0343236327910784
0.0137725212504241	0.0612786475132243	0.161591023828413	0.0306411601964610	0.0911091201633450	0.0915716761288406	0.0489777513108497	0.0343236327910784

joichiro nishi 2018-12-6

>The first two matrices being vertcat are i(end) by max(i) with all rows having the same value.

The third and fourth are l(end)-i(end) by max(l) with all rows having the same value.

You will not be able to horzcat or vertcat this collection together.

Ok. But before that I think my main issue is that for some reason the bd that gets passed to the constraint consists of this weird size and value that I have no idea where it came from [see images]. I'm weary of maybe my fitness function handle messing up the bd and from there it goes on to be passed to the constraint instead (If I haven't misunderstood, the function handle call "locks in" the variables it calls, is that right?).

Anyway, now that I've used a generated initial population instead of a custom creation function, is my code for the constraint correct? Or do I need to vectorialize some lines like R = ...?

[The wrong one is the first pic, and the correct bd value is the second pic]