Drexel dragonThe Math ForumDonate to the Math Forum



Search All of the Math Forum:

Views expressed in these public forums are not endorsed by Drexel University or The Math Forum.


Math Forum » Discussions » Software » comp.soft-sys.matlab

Topic: Minimization using Fmincon Error
Replies: 2   Last Post: Aug 5, 2013 4:29 PM

Advanced Search

Back to Topic List Back to Topic List Jump to Tree View Jump to Tree View   Messages: [ Previous | Next ]
Vsh

Posts: 13
Registered: 12/8/12
Minimization using Fmincon Error
Posted: Aug 5, 2013 2:02 PM
  Click to see the message monospaced in plain text Plain Text   Click to reply to this topic Reply

Hello everyone,
I'm working on a minimization problem with the objective of minimizing the difference between the measured properties and my model's input parameters (5 variables). I'm using fmincon: thus I have an objective function (i.e. my mechanistic model), initial guesses for my variables, no linear equality/inequality (i.e. [],[],[],[]), lower bound, upper bound for all variables and a constraint function (i.e. nlconst) to ensure positive, definitness of my variables.

Of course my code is not working but I quiet don't get where it fails, I was hoping you guys could help me understand what these error messages mean:

Error using optimfcnchk/checkfun (line 318)
User function 'homogenizationRoutine1t' returned NaN
when evaluated;
FMINCON cannot continue.

Error in nlconst (line 744)
f = feval(funfcn{3},x,varargin{:});

Error in fmincon (line 837)
[X,FVAL,LAMBDA,EXITFLAG,OUTPUT,GRAD,HESSIAN]=...

Does this mean that my constraints (defined by me) cannot be met using the defined objective function (also defined by me)?



Point your RSS reader here for a feed of the latest messages in this topic.

[Privacy Policy] [Terms of Use]

© Drexel University 1994-2014. All Rights Reserved.
The Math Forum is a research and educational enterprise of the Drexel University School of Education.