Answered

Using GA can I put a condition on Population?

Sure, that is a simple linear inequality constraint. Probably easiest to represent using the problem-based formulation, but do w...

Using GA can I put a condition on Population?

Sure, that is a simple linear inequality constraint. Probably easiest to represent using the problem-based formulation, but do w...

3 meses ago | 0

Answered

how to write multi objective particle swarm optimization?

As you probably understand, particleswarm is for single-objective optimization. You can fake the multiobjective part by taking a...

how to write multi objective particle swarm optimization?

As you probably understand, particleswarm is for single-objective optimization. You can fake the multiobjective part by taking a...

4 meses ago | 0

Answered

fmincon does not fulfil constraints

As documented, Iterations Can Violate Constraints. So I am not sure whether you are complaining about intermediate iterations (w...

fmincon does not fulfil constraints

As documented, Iterations Can Violate Constraints. So I am not sure whether you are complaining about intermediate iterations (w...

4 meses ago | 0

| accepted

Answered

Gradient Calculation with fmincon and UseParallel

This is not the expected performance. I would usually expect that parallel gradient estimation would give you quite a bit of spe...

Gradient Calculation with fmincon and UseParallel

This is not the expected performance. I would usually expect that parallel gradient estimation would give you quite a bit of spe...

4 meses ago | 0

Answered

Recommended ML toolbox for complex spaceship braking optimization.

You might be able to use some Optimization Toolbox solvers. There is one (laughably simplified, but still) relevant example here...

Recommended ML toolbox for complex spaceship braking optimization.

You might be able to use some Optimization Toolbox solvers. There is one (laughably simplified, but still) relevant example here...

4 meses ago | 0

Answered

Genetic Algorithm and PSO not varying from initial point, regardless of parameters and fitness function

You have a linear objective function and linear constraints. You should use linprog to solve your problem. Typically, a linear p...

Genetic Algorithm and PSO not varying from initial point, regardless of parameters and fitness function

You have a linear objective function and linear constraints. You should use linprog to solve your problem. Typically, a linear p...

4 meses ago | 0

Answered

optimization toolbox in matlab

This sounds like a job for intlinprog. Alan Weiss MATLAB mathematical toolbox documentation

optimization toolbox in matlab

This sounds like a job for intlinprog. Alan Weiss MATLAB mathematical toolbox documentation

4 meses ago | 0

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...

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...

4 meses ago | 1

| accepted

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...

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...

4 meses 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...

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...

4 meses 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...

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...

4 meses 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...

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...

4 meses ago | 0

| accepted

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....

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....

4 meses 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...

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...

5 meses 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...

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...

5 meses ago | 0

| accepted

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...

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...

5 meses ago | 1

| accepted

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...

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...

5 meses 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...

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...

5 meses 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...

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...

5 meses ago | 0

| accepted

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...

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...

5 meses 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 ...

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 ...

5 meses ago | 0

| accepted

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...

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...

5 meses 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...

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...

6 meses ago | 1

| accepted

Answered

When I'm using the fmincon function to solve an optimization problem，the 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 ...

When I'm using the fmincon function to solve an optimization problem，the 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 ...

6 meses 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...

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...

6 meses 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...

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...

6 meses 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...

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...

6 meses ago | 0

| accepted

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...

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...

6 meses ago | 0

| accepted

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...

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...

6 meses 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...

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...

6 meses ago | 0

| accepted