How do I minimize a function

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akhila k 2018-5-23

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评论： Ameer Hamza 2018-5-23

I got an 8th degree equation for a curve through curve fitting toolbox and I have to Minimize it. So how would I understand what parameters are chosen or what kind of function to choose for a particular equation.

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Answer 1

Majid Farzaneh 2018-5-23

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在 MATLAB Online 中打开

Hi, You can use genetic algorithm (ga) like this:

[x, Fval]=ga(@(x) your_fcn(x), N)

N is number of variables in your function. The output contains x (your optimum values for your variables) and Fval (minimum value provided by optimum x). If you have constrains try

help ga

Also you can use fmincon. Try

help fmincon

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Ameer Hamza 2018-5-23

I would suggest using fmincon. Since the estimated function is an analytical so fmincon will be able to quickly and more accurately estimate the minima.

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