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From S├ębastien Brisard <>
Subject Re: [math] Usage of DifferentiableMultivariateRealFunction
Date Mon, 14 May 2012 08:34:13 GMT
Hi Andreas,
> My Question: Can someone show me an example for the usage of
> DifferentiableMultivariateRealFunction and a matching optimizer. I
> understand the concept but the implementational details are hard to find.
> Here is what i understood:
> value: the value of the function.
> gradient(): an array containing all partial derivitivs gradients for the
> parameters.
> partialDerivitive: Value containing only one gradient of the function
> if i provide this basic implementation i should pass this to the optimizer.
> Or do i have to provide an extra target function to the optimizer as
> inicated by some optinmizers with the <FUNC> operator?

The user guide [1] shows a detailed example of the use of the
Levenberg-Marquardt optimized. Also, you can have a look to the new
AbstractLeastSquaresOptimizerAbstractTest [2] (available only through
svn). The doTestStRD is another illustration.

Hope this helps,

line 470

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