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What does this lsqnonlin error mean?
This error is occurring because your function is returning arrays of varying sizes. In this case, it is being caught during fini...

12年以上 前 | 1

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What does this Fmincon error mean?
This is a bug with the parallel finite differences approximation code. In particular, how this feature works with "invalid" valu...

12年以上 前 | 1

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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...

約13年 前 | 0

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

13年以上 前 | 0

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

13年以上 前 | 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/...

13年以上 前 | 0

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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...

14年弱 前 | 0

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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...

14年弱 前 | 0

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

14年弱 前 | 0

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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...

14年弱 前 | 0

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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...

14年弱 前 | 0

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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...

14年弱 前 | 1

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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...

約14年 前 | 0

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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...

約14年 前 | 0

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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...

約14年 前 | 2

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

約14年 前 | 0

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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...

14年以上 前 | 0

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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...

14年以上 前 | 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...

14年以上 前 | 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, ...

14年以上 前 | 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...

14年以上 前 | 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...

14年以上 前 | 0

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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...

14年以上 前 | 0

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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...

14年以上 前 | 0

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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...

14年以上 前 | 2

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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...

15年弱 前 | 0