Answered
How to use ObjectiveCutOff and ObjectiveImprovementThreshold from optimoptions in solver-based optimization problems
I think that you have a mistaken view of what these options do. Consult the options to see what they really do. I don't think th...

3 years ago | 0

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Answered
Error using ofun Too many input arguments.
I cannot reproduce your issue. When I try the following, I do not get an error: x = randn(20,1); r = ofun(x) function f = o...

3 years ago | 0

Answered
How to fit a generate polynomial coefficients of with general requirements
I could be wrong, but it sounds to me as if the Problem-Based Optimization Workflow would work well for you. You do not have an ...

3 years ago | 0

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How to fit a function to 2D array when some parts of the underlaying function are known?
Well, it depends what you mean by "Z is proportional to c/X and Z is proportional to c2 + c3Y + c4Y^2". You could mean that Z is...

3 years ago | 0

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Answered
Relation between population size and function count for genetic algorithm
The answer is that some population members are "elite," and they do not have to be evaluated again. See How the Genetic Algorith...

3 years ago | 0

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Answered
Working of PSO with hybrid function
It means the hybrid function runs after particleswarm stops. Ends. Is done. That's what terminates means. In fact, it is equival...

3 years ago | 1

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Answered
Minimization and Optimization. Minimize output by optimizing inputs
Sounds like you would be best served with the Problem-Based Optimization Workflow. Declare the variables that can change as opti...

3 years ago | 0

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Answered
Unable to perform assignment because the size of the left side is 1-by-14 and the size of the right side is 14-by-14.
The error statement is clear: your assignment (equality) statement has a 1-by-14 vector on the left and a 14-by-14 matrix on the...

3 years ago | 0

Answered
fmincon is returning some garbage values in the final output
When I run your script I get the same results as you, so thank you for including all the relevant information. Note that your c...

3 years ago | 0

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(OPTIMIZATION) Initial point is a local minimum - PROBLEM!!
I suggest that you plot the square of the objective function over a reasonable range of the parameter and over a small range suc...

3 years ago | 0

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Answered
solve a set of two linear equations
I don't really understand what you are trying to do, but it sounds to me like your best bet is to use the Problem-Based Optimiza...

3 years ago | 0

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Solve taking too long, how to optimize code?
Another point of view in case Matt's solution is not satisfactory: work completely in floating point computation rather than sym...

3 years ago | 0

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Refreshment of the objective function with FMINCON
I think that you have a mistaken view of what fmincon does. All optimization solvers take a fixed objective function and iterate...

3 years ago | 1

Answered
Optimisation: minimise function while maximising a design variable
Perhaps you can change the optimization in a nearly unnoticeable way that would bias solutions to have large values of R, like t...

3 years ago | 2

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Problem using fminbnd function
All optimization solvers require that the objective function return a scalar value. You need to write your objective function in...

3 years ago | 0

Answered
Augmented Lagrangian and Penalty Methods
Sounds like a homework problem. I suggest that you consult the documentation for passing extra parameters, such as Passing Extr...

3 years ago | 0

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Find gradient numerically for the equation
There are tools on the File Exchange that can help you find numerical approximations to derivatives. For example, see Adaptive R...

3 years ago | 0

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Answered
optimization problem - problem using det funciton
The main problem is that det is not a Supported Operations on Optimization Variables and Expressions. For example, x = optimvar...

3 years ago | 1

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Answered
How to optimize nonlinear multiple input model with multiple constraints
I doubt that you want a symbolic solution. You probably want numbers. So I suggest that you use the Problem-Based Optimization W...

3 years ago | 0

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can i use different solvers for problem based optimisation in matlab
You CAN use different solvers. The question is, SHOULD you? In other questions you have shown that you are trying to solve an MI...

3 years ago | 0

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Answered
Optimizing 1 equation with 7 variables
I think that you would have an easier time formulating your problem by using the problem-based approach. However, if you really...

3 years ago | 0

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Matlab optimprob _Problem based _how can i see the optimal parameter setting while using optimprob
You can set a plot function in the options for your solver. To see which solver is being used, call optimoptions: options = opt...

3 years ago | 0

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Answered
How to find fixed number of variables with value 1 using Genetic Algorithm with population type Bitstring ?
If I understand you correctly (and I might not have understood), you want to impose a linear constraint on the population x sum...

3 years ago | 0

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Answered
Find best input combinations that will maximize the output of a non-linear ODE mathematical model
Add the parameters to optimize as a vector in your ODE calculation: function rest = Scrpt1(t,X,params) x2 = X(1); x3 = X(2);...

3 years ago | 1

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Answered
How to use simulated annealing to optimize a simulation based, multicriteria Problem?
Your question confuses me because you talk about having a multiobjective problem but then seem to want to use simulannealbnd to ...

3 years ago | 0

Answered
parallel computing in Genetic algorithm
You have to be careful using parallel computing. Are you using Simuulink® for the simulation? I am not sure that it can run in p...

3 years ago | 0

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How to find a part of function value in Genetic Algorithm after each iteration cycle
I think that you can write a Custom Output Function for Genetic Algorithm and use it to calculate what you want and store them i...

3 years ago | 0

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Answered
Coding a GA using constraint functions but getting array size error. - SOLVED
I think that you can investigate this problem yourself by using the debugger to set a break point at or just before line 119, an...

3 years ago | 0

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Answered
multi constraints fmincon optimization
I don't know which of these variables are optimization variables, meaning those that can be changed to try to optimize, and whic...

3 years ago | 0

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Answered
surrogateopt: get handle of optimized surrogate function
Sorry, the surrogate is not returned and is not available. We have no idea whether the surrogate is a good approximation to the ...

3 years ago | 1

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