Inner matrix dimensions must agree error in ga

Hi every one

I have this function and constraint as below for optimizing by ga.

function=1.11e-4*((z).^2)-(4.46e3*(z))

A=[1;-1]

b=[1.97e8;0]

P1= ga(@(z) (1.11e-4*((z).^2)-(4.46e3*(z))),1,[1;-1],[1.97e8;0]);

and after run this error apears:

Error using  * 
Inner matrix dimensions must agree.

Error in isTrialFeasible (line 59)
        constrViolation = Aineq*X-bineq;

Error in gacreationlinearfeasible>feasibleLHS (line 187)
        feasible = isTrialFeasible(initialPopulation,linCon.Aineq,linCon.bineq, ...

Error in gacreationlinearfeasible (line 41)
        feasiblePop = feasibleLHS(individualsToCreate,GenomeLength,options);

Error in makeState (line 29)
      state.Population = feval(options.CreationFcn,GenomeLength,FitnessFcn,options,options.CreationFcnArgs{:});

Error in galincon (line 17)
state = makeState(GenomeLength,FitnessFcn,Iterate,output.problemtype,options);

Error in ga (line 359)
            [x,fval,exitFlag,output,population,scores] = galincon(FitnessFcn,nvars, ...

Error in checknevis (line 1)
P1= ga(@(z) (1.11e-4*((z).^2)-(4.46e3*(z))),1,[1;-1],[1.97e8;0]);
 
>> 

what should i do???

Answer 1

[Star Strider]

There is only one parameter, however it has two conflicting constraints.

The constraints are:

Unless there is something about this that I am missing, it would probably be better to put those as the ‘lb’ and ‘ub’ bounds instead:

lb = 0;

ub = 1.98e8;

P1= ga(@(z) (1.11e-4*((z).^2)-(4.46e3*(z))),1,[],[],[],[],0,1.9e8)

Optimization terminated: average change in the fitness value less than options.FunctionTolerance.

P1 = 1.8422e+07

.

[shirin mhd]

I'm really thankful for your help.

[Star Strider]

As always, my pleasure!