MATLAB運用優(yōu)化工具解決問題時，怎么定義多元函數(shù)。一元的：function=文件名（x）；y=2*x^2;..其中有要確定目標函數(shù)的么，用FUNCTION搞定，怎么定義多元的如：y=x1*x2/x3菜鳥求助，問題白癡，多多包涵
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瀟瀟雨雨
TA貢獻1833條經(jīng)驗 獲得超4個贊
如果是多元函數(shù)的話，可以參考fminseach
Example 1
The Rosenbrock banana function is a classic test example for multidimensional minimization:
f=x(1)^2+a*x(2)^2; 目標函數(shù)
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) 新建著這樣的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])
用這樣的格式條用fminseach以及M函數(shù)， 其中[-1.2,1]為優(yōu)化其實點
This produces 運行以后的結果
x =
1.0000 1.0000
fval = 這個是優(yōu)化點的函數(shù)值
8.1777e-010
This indicates that the minimizer was found to at least four decimal places with a value near zero.
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