OptimizationExpression

作者:佚名    发布时间:2024-05-13 10:17:29    浏览:

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创建与目标函数对应的优化表达式

f(x)=x2/10+exp(-exp(-x)).

x=optimvar('x');
f=x^2/10 + exp(-exp(-x))
f=Nonlinear OptimizationExpression

    ((x.^2 https://ww2.mathworks.cn/help/optim/ug/ 10) + exp((-exp((-x)))))

从点 开始,找到最小化 的点。

x0=struct('x',0);
prob=optimproblem('Objective',f);
[sol,fval]=solve(prob,x0)
Solving problem using fminunc.

Local minimum found.

Optimization completed because the size of the gradient is less than
the value of the optimality tolerance.
sol=struct with fields:
    x: -0.9595

fval=0.1656

如果 不是受支持的函数,您可以使用 对其进行转换。请参阅Supported Operations for Optimization Variables and Expressions将非线性函数转换为优化表达式

f=@(x)x^2/10 + exp(-exp(-x));
fun=fcn2optimexpr(f,x)
fun=Nonlinear OptimizationExpression

    ((x.^2 https://ww2.mathworks.cn/help/optim/ug/ 10) + exp((-exp((-x)))))

prob=optimproblem('Objective',fun);
[sol,fval]=solve(prob,x0)
Solving problem using fminunc.

Local minimum found.

Optimization completed because the size of the gradient is less than
the value of the optimality tolerance.
sol=struct with fields:
    x: -0.9595

fval=0.1656

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