Answered
Determinant of the Jacobian as a constraint couldn't avoid atan2(x,y) get into negative.
While I do not know what you are really doing, you should know that nonlinear constraints are not satisfied at intermediate iter...

10 months ago | 1

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Answered
Genetic algorithm takes too much time to solve _ only linear objective and constraints
You say that you have a linear objective function and linear and integer constraints. In that case, you should not use the gene...

10 months ago | 1

Answered
Arrays have incompatible sizes for this operation error
You are mixing up the two approaches, problem-based and solver-based. You cannot do that. You have x and y defined as optimizati...

10 months ago | 0

Answered
how to Plot convergence of Simulated annealing optimization problem?
Perhaps you want to collect the cost as a vector that you can then plot. Something like this: % Put this line immediately after...

10 months ago | 0

Answered
Very small feasibility value but very large first-order optimality value
This is a very interesting issue; I have never seen anything quite like it before. Apparently, you are providing gradients for b...

10 months ago | 0

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Answered
Arrays have incompatible sizes for this operation error
It looks like the issue is that ai is not 36-by-36. You probably want something like ai = repmat(ai,1,36); z= (-1)*sum(x.*rij....

10 months ago | 0

Answered
How to input mixed positive integer variable to "gamultiobj" fitness function?
If your MATLAB version is R2021b or later, you can use integer constraints in gamultiobj. For details, see the function referenc...

10 months ago | 0

Answered
How to introduce constraints to my objective function (Genetic Algorithm)
You have at least two errors that keep the constraint function from working properly. First, this section needs a loop such as f...

11 months ago | 0

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Answered
Problem training Gaussian process with 'ardsquaredexponential' kernel function using bayesopt
As stated in the documentation for OptimizeHyperparameters: "KernelScale cannot be optimized for any of the ARD kernels." Alan...

11 months ago | 1

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Answered
Optimization completed because the size of the gradient is less than the value of the optimality tolerance.
I think that you are mistaking the exit message for the solution. The solution resides in the p variable that the solver returns...

11 months ago | 1

Answered
I am doing Genetic algorithm for optimisation , but it is very slowly optimising, 1st itteration is not complete since 5hours but it is showing optimisation running.
ga is a slow algorithm. Most likely you have nonlinear constraints, which makes the algorithm even slower. If you do not have in...

11 months ago | 0

Answered
Get best hyperparameters for ionosphere data using fitcecoc & bayesopt. but i am getting error optimizableVariable.
I do not understand why you are attempting to use fitcecoc with a 2-class model. Try this instead: load ionosphere mdl = fitcs...

11 months ago | 0

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Answered
How to solve "Conversion to logical from optim.problemdef.OptimizationInequality is not possible." for logical statement for variable.
You need to take care of logical constraints using a roundabout sort of modeling construct. The documentation is here: Integer a...

11 months ago | 0

Answered
fmincon pause after 2 iterations when using gradients
I don't know for sure, but MATLAB has a just-in-time compiler that does indeed make a sort of cache for code that is repeatedly ...

11 months ago | 0

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Answered
lsqnonlin projectBox error when using OutputFcn
The error is because optimValues.residual is a vector, not a scalar. Possibly you want to write norm(optimValues.residual). Ala...

11 months ago | 0

Answered
How can I ensure the nonlinear constraints are met before running the objective function?
You are in luck: all of your "nonlinear" constraints are, in fact, linear constraints. Simply rewrite your constraints as linear...

11 months ago | 1

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Answered
When I'm using the fmincon function to solve an optimization problem´╝îthe optimization result is always near the initial value. How to avoid this situation?
There is a documentation section about this issue: Final Point Equals Initial Point. There is also the possibility that you are ...

11 months ago | 0

Answered
How can I use Genetic Algorithm toolbox to calibrate a model?
It is entirely possible that I have misunderstood your question in some way. Feel freee to ask again with more explanation if my...

11 months ago | 0

Answered
Optimization for differential equations and measuring points
You might find the following examples relevant: Fit ODE, Problem-Based Fit an Ordinary Differential Equation (ODE) Alan Weiss...

12 months ago | 0

Answered
pass double symbolic expression to paretosearch
It depends on how you created your symbolic expressions. If you have two expressions, say obj1 and obj2, then two runs of matla...

12 months ago | 0

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Answered
How can I using fmincon on both vector variables and matrix variables
You might enjoy the problem-based approach, which does not require you to put all variables into one. Alan Weiss MATLAB mathem...

12 months ago | 0

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Answered
The StartPoint of Curve Fitting of the Function f(x)=a*exp(-x/b)+c
I think that your data is very small, about order 1e-8 instead of order 1. Here is a little script I knocked together that seems...

12 months ago | 0

Answered
Optimize the more than one variable in bayesopt
I believe that the error is in this line: [y_pred,~] = predict(model,x.opt_v); The software passes a table of values in x, wit...

12 months ago | 0

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Answered
How to generate the objconstr for multivariate surrogate optimization with nonlinear constraints?
Try this: obj = matlabFunction(symbolic_objective_function,'vars',{x}); constr = matlabFunction(symbolic_nonlinear_constraints...

12 months ago | 0

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Answered
problem with solving system of differential equations
If you are willing to have a numerical solution, rather than a symbolic solution, then using fsolve along with ode45 can work. T...

12 months ago | 0

Answered
How Can I improve the result of Surrogateopt Optimization?
Is your initial point Xint feasible? In other words, does it satisfy Xint >= lb Xint <= ub Aeq*Xint' = beq A*Xint' <= b f.I...

12 months ago | 0

Answered
How does the Surrogateopt function consider nonlinear integer constraints?
Your "nonlinear" inequality constraints are, in fact, linear inequality constraints. I suggest that you express them as linear c...

12 months ago | 0

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Answered
Is it possible to make create custom InitialPopulation for N simulation iterates of genetic algorithm w/o resetting optimoptions N times?
You can use a custom creation function. As you probably know, this function can have the syntax function Population = myfun(Gen...

12 months ago | 0

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Answered
Failure in initial objective function evaluation. FSOLVE cannot continue
I think that you are missing parameters: function res = lista1b_fct(x) Tee = x(1); Cee = x(2); res(1) = q*Cf - q*Cee - V*k0*...

12 months ago | 0

Answered
How to define a binary variable as part of constraints in the optimization problem(fmincon)?
fmincon does not accept binary constraints, or any integer constraints. The only solvers that accept a nonlinear objective funct...

12 months ago | 0

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