How do I minimize a function

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.

Answer 1

[Majid Farzaneh]

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

[Ameer Hamza]

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.