Talk:Quasi-Newton method

An image
Are there any nice images describing this method? I think that would be really helpful. I eel like I've seen images in text books that made this easy to understand. Chogg (talk) 00:18, 19 August 2017 (UTC)

Relation to Gauss-Newton / Gradient Descent / Levenberg-Marquardt methods
This topic is somehow related to Gauss-Newton method and Levenberg-Marquardt Method and Gradient descent. None of these requires second derivatives. Gauss-Newton, however, requires an overdetermined system.

The exact relations are not stated in this article. It would be helpful to show different assumptions or what the algorithms do have in common with quasi-Newton-methods.

Matlab Code
The Matlab code presented here is incomplete and unsourced. It calls subroutines Grad and LineSearchAlfa that are not defined. Also, there is no indication of the author or source of the code, or of the copyright status of the code. Unless this information can be determined, it should probably be deleted. J Shailer (talk) 19:22, 5 March 2012 (UTC)


 * I agree completely with Shailer. Regardless of the quality of the code, this is not the right venue (the right venue is http://www.mathworks.com/matlabcentral/fileexchange/). I propose a compromise step of moving the code to the talk page for now. Lavaka (talk) 13:29, 7 March 2012 (UTC)


 * I am posting that code here: Lavaka (talk) 13:34, 7 March 2012 (UTC)

Here is a Matlab example which uses the BFGS method.

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differences in notation w.r.t. the page Newton's method in optimization
I remarked differences in notation, especially in derivatives, when compared with the page : Newton's method in optimization. Could this be corrected ? I propose to use the notations f'(...) and f"(...) for derivatives of a multivariate function f, as in the page : Newton's method in optimization, as they seem more comprehensible. Pierre g111 (talk) 06:00, 27 July 2023 (UTC)