# Alan Weiss

### MathWorks

I write documentation for MATLAB mathematical toolboxes, primarily optimization. I have also written documentation for PDE, statistics, symbolic math, and econometrics.

My pre-MathWorks job was with Bell Labs, primarily in mathematical models of data traffic, with a strong interest in parallel computation and in rare events (large deviations).

I do not provide private consulting. If you have a question, please ask on a public forum such as MATLAB Answers.

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**Content Feed**

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...

6 días ago | 0

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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...

6 días ago | 0

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);...

14 días ago | 1

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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 ...

14 días ago | 0

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...

17 días ago | 0

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...

20 días ago | 0

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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...

20 días ago | 0

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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...

21 días ago | 0

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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 ...

28 días ago | 0

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Intlinrprog (maximize) vs excel Solver (Maximize)

Your problem is that you set intcon = 3; This means that the only variable restricted to be an integer is x(3). Instead you sh...

28 días ago | 0

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Multi-objective optimization

Are you looking for the gamultiobj solver? Or are you asking something else? Alan Weiss MATLAB mathematical toolbox documentat...

28 días ago | 0

Find values for best and mean fitness value for each generation in Genetic Algorithm

Use a Custom Output Function for Genetic Algorithm. Model it on the gaplotbestf plot function. To see that function, edit gaplo...

28 días ago | 1

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Optimization of multiple input variable to a model

Usually you should use a least-squares solver for nonlinear fitting. See Nonlinear Data-Fitting and Nonlinear Least -Squares, Pr...

28 días ago | 0

about genetic algorithm

The topic Mixed Integer ga Optimization adderesses this kind of question. For an example that uses integer variables for non-int...

28 días ago | 0

Linear programming exercise help

This looks like quadratic programming, not linear programming. In any case, it looks quite straightforward to solve this kind of...

28 días ago | 0

Solving an optimization problem using fmincon

I think that this is a straightforward problem is you use the problem-based optimization workflow, which requires a relatively r...

28 días ago | 1

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Bayesian Optimization Hyperparameters .

The bayesopt function performs all Bayesian optimization. The bayesopt algorithm is described here. When finding the best parame...

alrededor de 1 mes ago | 1

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How set properly a multiobjective optimization problem

I think that you need to understand that the optimization variables all need to be in one variable, typically called x. See Writ...

alrededor de 1 mes ago | 0

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Simulation: fminsearch in a for loop

Do you really want TolFun = 1000? Are you sure? I am not sure that I understand what you are trying to do, but maybe you have a...

alrededor de 1 mes ago | 0

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3 variable Linear function problem

In linprog set lb = [0 0 -Inf]; You will have to take the negative of your objective function vector in order to maximize. Al...

alrededor de 1 mes ago | 0

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prediction using genetic algorithm

Perhaps you are looking at fitting a parameterized model to data using the genetic algorithm. You can follow the Nonlinear Data-...

alrededor de 1 mes ago | 0

How do I optimise a logarithmic (log) function in Matlab?

It depends on which variables you can change in your optimization process, and whether there are any constraints such as bounds....

alrededor de 1 mes ago | 0

Solving a MINLP Optimization Problem

There are two MINLP solvers in Global Optimization Toolbox: ga and surrogateopt. Either should work for you. The surrogateopt so...

alrededor de 1 mes ago | 2

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How to optimize the variables of a regression model

I think that you need to connect your data argument to your x argument. Something like this: function f = objconstr(x,trainedMo...

alrededor de 1 mes ago | 1

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Bayesian Optimization Output Functions within Matlab App

I don't know what you mean "when calling a function within an app, I need to also supply the argument app." However, maybe I ca...

alrededor de 1 mes ago | 0

Error using MATLAB GA - [left and right sides have a different number of elements]

I do not understand this line: objFun = @(x) my_objFun(var1(j),var2(i)); Where does the variable x enter objFun? I think that ...

alrededor de 1 mes ago | 0

Find best input combinations that will maximize the output of a non-linear ODE mathematical model

I don't know what an SBML file is. But to optimize an ODE you can look at these examples: Fit ODE, Problem-Based Fit an Ordina...

alrededor de 1 mes ago | 0

Gamultiobj only finding one point on pareto front

I suggest that you find the single-objective minima as in Start from Single-Objective Solutions or Start from Single-Objective S...

alrededor de 2 meses ago | 0

How can i multiply each element of structured array

I'm sorry that you are having these problems, but you must realize that all of them are due to size mismatches in your structure...

alrededor de 2 meses ago | 0

How can i multiply each element of structured array

You need to extract the correct elements from your structures before using them. I am not sure what you mean to have as an objec...

alrededor de 2 meses ago | 0