Answered
Generating iterations from Genetic Alogrithim
Do you have the Global Optimization Toolbox? That's the first step if you want to use GA. See this about GA: <http://www.mat...

ongeveer 9 jaar ago | 0

Answered
Problem with subfunction within lsqnonlin??
All values returned to lsqnonlin must be of data type double.

meer dan 9 jaar ago | 0

Answered
PCA by optimization
Hi MJ, Optimization toolbox functions will minimize over "X" where X can be a matrix or vector. Internally, matrices get flat...

meer dan 9 jaar ago | 0

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Fixed Charge Network Flow Model Problem
Here's a basic LP example that shows how to use linprog (the LP solver in Optimization Toolbox): http://www.mathworks.com/help/...

meer dan 9 jaar ago | 0

Answered
UPDATING Upper and Lower Bounds in MultiStart Optimization
It seems like you want to solve several different problems. Each time you change the bounds, the optimization problem is differe...

bijna 10 jaar ago | 0

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Answered
problem with fsolve - unpredictable results with long data vectors
I'm not sure what exactly is going on here. Fsolve seems to be finding a solution in both cases, correct? Since the system is sq...

bijna 10 jaar ago | 0

Answered
blackbox function
Just to close the thread, the answer is given by Alan and others here: http://www.mathworks.com/matlabcentral/newsreader/view...

bijna 10 jaar ago | 0

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Answered
optimization problem solution: [500x12000].X = [500x1] ??
Here's a suggestion I posted over at the newsgroup: The default algorithms for both lsqlin and quadprog accept sparse matrice...

bijna 10 jaar ago | 0

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Answered
Quadratic optimization with quadratic constraints
Hi Rene (sorry, can't get the accent right) You can use FMINCON to solve this problem. However, there is no dedicated input f...

bijna 10 jaar ago | 0

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Answered
fmincon not optimizing over one variable
It may appear to fmincon that the function has a zero derivative with respect to the variable in question. How sensitive is your...

bijna 10 jaar ago | 1

Answered
Quadprog - dependent rows in constraint matrix
Is A for your inequality constraints or equality constraints? Also, it may depend on the algorithm. If you have redundant ine...

ongeveer 10 jaar ago | 0

Answered
Lower and Upper bounds in LSQNONLIN
The start point is one of a few things you can change to influence the solver. There are other options (tolerances, etc) that ma...

ongeveer 10 jaar ago | 0

Answered
option to stop lsqnonlin when residual norm value reached
Hi Tony, There are no tolerances to stop lsqnonlin when the residual norm crosses a threshold. What you can do instead is set...

meer dan 10 jaar ago | 2

Answered
Slacktol value ?
If anyone else checks this, know that the problem given above is infeasible and the solution is erroneous. It's not recommen...

meer dan 10 jaar ago | 0

Answered
Interior-point in fmincon without inequality constraints
You're correct, without inequalities, the interior point algorithm is a fairly straightforward algorithm. In the case where your...

meer dan 10 jaar ago | 0

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Answered
Unconstrained Optimization with Additional Parameters
We've yet to see your code for the analytical gradient calculation (hopefully we don't ;) ). I suspect that the error might be t...

meer dan 10 jaar ago | 0

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Optimization with a vector of penalty functions
Hi Oliver, I think that fmincon is struggling with this for two reasons. fmincon is meant to work on smooth-continuous proble...

meer dan 10 jaar ago | 0

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Strict inequalities in fmincon
Effectively, you're defining a new strict inequality A*x <= b-e where "e" can be arbitrarily small. As the cyclist pointed out, ...

meer dan 10 jaar ago | 0

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lsqnonlin - output value at each iteration?
I'm not sure what you mean by "value of each iteration". The parameter values? The value of your system (F(x))? Either way, l...

meer dan 10 jaar ago | 1

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How to solve coupled optimization problem in MATLAB?
I think that you want to use lsqnonlin or lsqcurvefit to solve your problem. They are built to handle problems of the form: min...

meer dan 10 jaar ago | 0

Answered
using fsolve for real answers
fsolve (and all other functions in the Optimization Toolbox) are not supposed to work with complex data. You need to make sure t...

bijna 11 jaar ago | 0

Answered
Nonlinear least square minimization
Your answer looks ok. lsqnonlin is a good choice. You could also look at lsqcurvefit: http://www.mathworks.com/help/toolbox/o...

bijna 11 jaar ago | 0

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Answered
supplied Hessian of fmincon
As you stated, fmincon provides a BFGS approximation to the Hessian of the Lagrangian. However, the BFGS matrix is a positive de...

bijna 11 jaar ago | 2

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Answered
fminunc works, fmincon does not
Hi Kasper, It's hard to tell what's going on from the code, so I'll just offer some generalities. Each solver and algorith...

bijna 11 jaar ago | 0