其中有要确定目标函数的么，，用FUNCTION搞定，怎么定义多元的如：y=x1*x2/x3
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MATLAB运用优化工具解决问题时，怎么定义多元函数。一元的：function=文件名（x）；y=2*x^2;..
答案:2 悬赏:30 手机版
解决时间 2021-02-01 21:45
- 提问者网友：寂寞撕碎了回忆
- 2021-02-01 12:57
最佳答案
- 五星知识达人网友：煞尾
- 2021-02-01 13:48
如果是多元函数的话，可以参考fminseach
Example 1
The Rosenbrock banana function is a classic test example for multidimensional minimization:
f=x(1)^2+a*x(2)^2; 目标函数
The minimum is at (1,1) and has the value 0. The traditional starting point is (-1.2,1). The anonymous function shown here defines the function and returns a function handle called banana:
function f=myfun(x,a) 新建着这样的M文件
banana = @(x)100*(x(2)-x(1)^2)^2+(1-x(1))^2;
Pass the function handle to fminsearch:
[x,fval] = fminsearch(banana,[-1.2, 1])
用这样的格式条用fminseach以及M函数， 其中[-1.2,1]为优化其实点
This produces 运行以后的结果
x =
1.0000 1.0000
fval = 这个是优化点的函数值
8.1777e-010
This indicates that the minimizer was found to at least four decimal places with a value near zero.
Example 1
The Rosenbrock banana function is a classic test example for multidimensional minimization:
f=x(1)^2+a*x(2)^2; 目标函数
The minimum is at (1,1) and has the value 0. The traditional starting point is (-1.2,1). The anonymous function shown here defines the function and returns a function handle called banana:
function f=myfun(x,a) 新建着这样的M文件
banana = @(x)100*(x(2)-x(1)^2)^2+(1-x(1))^2;
Pass the function handle to fminsearch:
[x,fval] = fminsearch(banana,[-1.2, 1])
用这样的格式条用fminseach以及M函数， 其中[-1.2,1]为优化其实点
This produces 运行以后的结果
x =
1.0000 1.0000
fval = 这个是优化点的函数值
8.1777e-010
This indicates that the minimizer was found to at least four decimal places with a value near zero.
全部回答
- 1楼网友：持酒劝斜阳
- 2021-02-01 14:01
搜一下：MATLAB运用优化工具解决问题时，怎么定义多元函数。一元的：function=文件名（x）；y=2*x^2;..
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