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how can I use Newton's method to find the extremum with error < 10^-4 ?

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Geir 2013-10-15

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https://ww2.mathworks.cn/matlabcentral/answers/90298-how-can-i-use-newton-s-method-to-find-the-extremum-with-error-10-4

编辑： Nishitha Ayyalapu 2013-10-15

f = @(x) 20.*exp(-(x-4).^4) + 6.*sin((pi./7).*x) + 0.4.*x + 20 ;

df = -80.*exp(-(x-4).^4).*((x-4).^3) + ((6./7).*pi).*cos((pi./7).*x) + 0.4 ;

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Nishitha Ayyalapu 2013-10-15

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编辑：Nishitha Ayyalapu 2013-10-15

在 MATLAB Online 中打开

These functions can do the job: Derivative-free approach:

fminsearch

Derivate based approach

fminunc

You can find more about the available optimization tools here:

http://www.mathworks.com/help/optim/functionlist.html

http://www.mathworks.com/help/matlab/optimization.html

Hope this helps!!

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