Answered
GA violates the linear inequality constraints
You have expressed your constraints as nonlinear inequality constraints, not as linear inequality constraints. If the constraint...

7 years ago | 0

| accepted

Answered
How to set up user-supplied Hessian in fmincon for a minimization problem with nonlinear objective and nonlinear constraint?
For general advice related to this sort of problem, see Converged to an Infeasible Point. Alan Weiss MATLAB mathematical toolb...

7 years ago | 0

Answered
genetic algorithm optimisation toolbox
If you have a multiobjective function, then use gamultiobj instead of ga. Alan Weiss MATLAB mathematical toolbox documentation...

7 years ago | 1

| accepted

Answered
How to solve an optimization problem with stability constraints using 'fmincon'?
Perhaps this example will give you some ideas. It is written as a multiobjective problem, but you can adapt the code easily to s...

7 years ago | 1

Answered
I have a time series of monthly log returns, and want to transform these into monthly log prices. How do I proceed?
doc cumsum Alan Weiss MATLAB mathematical toolbox documentation

7 years ago | 0

Answered
Bayesopt: min observed objective not decreasing
Take a look at the note in the documentation of Coupled Constraints. Alan Weiss MATLAB mathematical toolbox documentation

7 years ago | 0

Answered
Plotting ga custom plot with additional inputs (calculated parameters )
When you create an anonymous function to pass extra parameters, the parameters that are available in the nested function are the...

7 years ago | 0

Answered
Find specific point in unknown "function"
The most efficient way is to use fzero as Torsten said. Your function is @(x)y(x)-1. For the most efficiency, set the initial po...

7 years ago | 2

| accepted

Answered
GA calculates wrong penalty
To answer your second question first, if you set a problem structure as documented then you can call ga by [x,fval] = ga(proble...

7 years ago | 0

| accepted

Answered
GA calculates wrong penalty
You are probably seeing the result of the integer-constrained solver. The fitness function is modified by a penalty term. It is ...

7 years ago | 0

Answered
Problems with fmincon constraints writing
You should not use linear constraints that way. Instead, use bounds. Your nonlinear constraint function looks fine. The reason...

7 years ago | 0

Answered
neumann boundary condition in diffusion on a disk and ring
I think that you might be making a modeling error. If the flux across the boundaries is zero, then perhaps you should not have t...

7 years ago | 0

Answered
Change the value of a variable between each iteration of fminsearch
I still think that I do not understand what you are really trying to do. But if you wnat to keep two functions equal, then in fm...

7 years ago | 0

Answered
Not enough input arguments for 'bayesopt'?
Please look at the documentation on Bayesian objective functions. The bayesopt solver passes a table to the objective function. ...

7 years ago | 1

Answered
fmincon: interior-point & SQP computational complexity
This question can probably be best estimated by scaling the problem from small to medium to lmedium-arge, running fmincon on all...

7 years ago | 1

Answered
How can I extract function evaluations that happen during iterations (fmincon) ?
The only way I know to do this is to have your objective function either display or write the values as it calculates them. The ...

7 years ago | 0

| accepted

Answered
i need help in optimization toolbox
It is possible that the documentation has enough detail for your purpose: Genetic Algorithm Terminology How the Genetic Algori...

7 years ago | 0

Answered
Use Bayesian Optimization on Existing Database
Do you want to query your database or run your model? If you want to just query your database, input the database into MATLAB an...

7 years ago | 0

Answered
Choosing the best approach to quadratic progamming problem
The differences between the approaches are outlined here. There are several examples of quadratic programming here, both problem...

7 years ago | 0

Answered
Question about an effect of ConstraintTolerance on multiple constraints for GA optimization
Thank you for the clear explanation. You have a difficult nonlinear problem with all integer variables. The solver is struggling...

7 years ago | 1

| accepted

Answered
Sparsity exploitation in optimization
There are several fmincon algorithms, and they each exploit sparsity differently. The term "large-scale" means that an algorithm...

7 years ago | 0

Answered
Algorithm parameter of solve ignored
You are passing the options incorrectly. See this example on the solve function reference page. Alan Weiss MATLAB mathematical...

7 years ago | 0

| accepted

Answered
How to use the decision variables of the optimization problem in if else statement
I do not understand your formulation. You have ll and ul as optimization variables, which is why you are getting the complaints ...

7 years ago | 0

Answered
fmincon with sqp algorithm but without inclduing a gradient
See Benefits of Including Derivatives in the documentation. Alan Weiss MATLAB mathematical toolbox documentation

7 years ago | 1

Answered
Drawing parabolas in pdeModeler
pdeModeler is for 2-D problems, so I assume that you have 2-D geometry. In this case, you can use a parametrized function for 2-...

7 years ago | 0

Answered
Error using fminunc with array as function output and multiple inputs
It is not clear what you are trying to do. Your P(x,T,Tmed) is not a scalar, so it is not clear what it means to minimize it. Y...

7 years ago | 0

Answered
Optimization Problem: Max Sharpe Ratio
Currently, as the documentation clearly states, the problem-based approach does not apply to general nonlinear problems. You mus...

7 years ago | 0

Answered
change stepsize of fmincon
See Set Larger Finite Differences. Also, check that your function returns different values for different inputs. Alan Weiss MA...

7 years ago | 0

| accepted

Answered
How to write selection function in genetic algorithm(Global Optimization Toolbox: ga)
I am not sure, but I am suspicious of the line GBparents(1,1)=find(expectation==B(1,1)); What makes you think that expectation...

7 years ago | 0

Answered
Convert Problem-Based to Solver-Based Optimization Problem
Coincidentally, that question was asked and answered recently. Bottom line: convert the problem by using prob2struct. Alan Weis...

7 years ago | 0