What is Mu and Performance Gradient ?

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I see these parameters in the NN Toolbox but I can't seem to find an explanation on what they are and how they work.
Anyone here can please clarify it for me or point me in the right direction please?
Thank you in advance!

Accepted Answer

Greg Heath
Greg Heath on 30 May 2013
help trainlm
doc trainlm
Look up trainlm and Levenberg-Marquardt in the website documentation
Look up Levenberg-Marquardt in Wikipedia
Hope this helps.
Thank you for formally accepting my answer
Greg
  1 Comment
Pedro
Pedro on 30 May 2013
Thank you! I think I see it, "Marquardt adjustment parameter" as is called in doc trainbr and more or less explained in doc trainlm.

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