How to find a global minimum?

44 次查看（过去 30 天）
Pasquale
Pasquale 2017-11-6
编辑： KSSV 2021-1-28
If I try to search the minimum of the function (that now I use as example) y=(1.2^-x)*sin(x), writing the following code, I obtain a local minimum, depending on the starting point choice.
fun=@(x) (1.2^-x)*sin(x)
x0=4
[xmin,fval,exitflag,output]=fminunc(fun,x0)
xmin =
4.532047925295373
fval =
-0.430572139266549
The value is correct looking at the function graph, but how can I find the global minimum? My function to minimize is more complicated, so it has a lot of local minima points, and it is impossibile to guess what is the best starting point
  2 个评论
Asatur Khurshudyan
Asatur Khurshudyan 2018-12-3
I am also searching for a similar algorithm. If you've found out something, please share.
Nesrine Mohamed
Nesrine Mohamed 2020-12-17
i try to search the global minimum of the function with two variablesany help please

请先登录，再进行评论。

请先登录，再回答此问题。

采纳的回答

Torsten
Torsten 2017-11-6
编辑：KSSV 2021-1-28

更多回答（0 个）

类别

在 Help Center 和 File Exchange 中查找有关 Direct Search 的更多信息

标签

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by