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Topic: Some parameters in GA
Replies: 5   Last Post: Feb 1, 2013 2:19 AM

 Messages: [ Previous | Next ]
 Alan Weiss Posts: 1,430 Registered: 11/27/08
Re: Some parameters in GA
Posted: Dec 3, 2012 8:12 AM

On 12/3/2012 6:09 AM, Sata wrote:
> 1) When I run the GA solver using the toolbox, is the objective
> function value the most critical output I have to monitor? When I run
> the GA repeatedly, do I have to record down other information for each
> run such as current iteration, reason for the optimization terminated
> and the final point?
> 2) Is there a standard reference of how many times we have to run for
> each set of parameter and then take the average of the objective
> function value?
> 3) For each run, the value for current iteration is different. How
> does this matter? Bigger value is better or smaller value is better.
> Is there an ideal value for current iteration? Do I have to do
> something to control the current iteration?
> 4) What is the meaning of this termination reason which was displayed
> at the results of toolbox ?Optimization terminated: average change in
> the fitness value less than options.TolFun.?
> 5) If I need to repeat the same set of parameter for ten times by
> using the toolbox, do I have to manually run it ten times and manually
> record the objective function value for each run? Is there another
> way which I can set to run ten times at once and record ten objective
> function values at once?
> 6) Will the stopping criteria for the number of generation affect my
> results? E.g does it matter if I set the number of generation to be
> 200, 300 or 400 etc.
> 7) In the constrain option, if I don?t have any constraints, do I just
> put [] for both linear equalities and linear inequalities?

You would do well to read the documentation, then see if you are still
confused. Read the Concepts material in
except for the Genetic Algorithm Options section. It won't take very

Alan Weiss
MATLAB mathematical toolbox documentation

Date Subject Author
12/3/12 Sata
12/3/12 Alan Weiss
12/3/12 Sata
12/8/12 Marc
12/11/12 Sata
2/1/13 Marc