Parameter estimation behavior by GA optimization toolbox

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Khoo
Khoo 2013-8-22
For the parameter estimation by GA optimization toolbox, is that possible that the estimated parameter deviates from the true values?
Thanks!

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Shashank Prasanna
Shashank Prasanna 2013-8-22
Do you know the true values? It is always entirely possible that the estimates are not the same as your true values that let you generate the data. After all you are only working with a sample dataset.
There are a number of ways to improve your results:
http://www.mathworks.com/help/gads/improve-results.html
You can use HybridFcn to try and improve the result using another solver from where GA terminated:
http://www.mathworks.com/help/gads/using-a-hybrid-function.html
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Khoo
Khoo 2013-8-23
Yea, I know the random initial value just like SA does. But then how can I find the mean square error then? The mean square error is defined by
mean(error^2)
where the error =estimated-initial point
Thanks!
Khoo
Khoo 2013-8-23
Okay. I guess i get it. By setting the 'InitialPopulation' in gaoptimset to my preference initial point.
Thank you very much!

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