作业帮我要用matlab中的fminsearch函数求二元函数f（x,y）=1/((x-1)^2+0.16)+1/((x-1)^2+0.16)的极值只这是我写的程序：f=@(x,y) 1./((x-1).^2+0.16)+1./((y-4).^2+0.16);x=-1:0.1:3;y=3:0.1:5;[X,Y]=meshgrid(x,y);z=f(X,Y);mesh(X,Y,z);opt=optim
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![我要用matlab中的fminsearch函数求二元函数f（x,y）=1/((x-1)^2+0.16)+1/((x-1)^2+0.16)的极值只这是我写的程序：f=@(x,y) 1./((x-1).^2+0.16)+1./((y-4).^2+0.16);x=-1:0.1:3;y=3:0.1:5;[X,Y]=meshgrid(x,y);z=f(X,Y);mesh(X,Y,z);opt=optim](/uploads/image/z/2683843-43-3.jpg?t=%E6%88%91%E8%A6%81%E7%94%A8matlab%E4%B8%AD%E7%9A%84fminsearch%E5%87%BD%E6%95%B0%E6%B1%82%E4%BA%8C%E5%85%83%E5%87%BD%E6%95%B0f%EF%BC%88x%2Cy%EF%BC%89%3D1%2F%28%28x-1%29%5E2%2B0.16%29%2B1%2F%28%28x-1%29%5E2%2B0.16%29%E7%9A%84%E6%9E%81%E5%80%BC%E5%8F%AA%E8%BF%99%E6%98%AF%E6%88%91%E5%86%99%E7%9A%84%E7%A8%8B%E5%BA%8F%EF%BC%9Af%3D%40%28x%2Cy%29+1.%2F%28%28x-1%29.%5E2%2B0.16%29%2B1.%2F%28%28y-4%29.%5E2%2B0.16%29%3Bx%3D-1%3A0.1%3A3%3By%3D3%3A0.1%3A5%3B%5BX%2CY%5D%3Dmeshgrid%28x%2Cy%29%3Bz%3Df%28X%2CY%29%3Bmesh%28X%2CY%2Cz%29%3Bopt%3Doptim)
我要用matlab中的fminsearch函数求二元函数f（x,y）=1/((x-1)^2+0.16)+1/((x-1)^2+0.16)的极值只这是我写的程序：f=@(x,y) 1./((x-1).^2+0.16)+1./((y-4).^2+0.16);x=-1:0.1:3;y=3:0.1:5;[X,Y]=meshgrid(x,y);z=f(X,Y);mesh(X,Y,z);opt=optim
我要用matlab中的fminsearch函数求二元函数f（x,y）=1/((x-1)^2+0.16)+1/((x-1)^2+0.16)的极值
只这是我写的程序：f=@(x,y) 1./((x-1).^2+0.16)+1./((y-4).^2+0.16);
x=-1:0.1:3;
y=3:0.1:5;
[X,Y]=meshgrid(x,y);
z=f(X,Y);
mesh(X,Y,z);
opt=optimset('display','iter');
[xy,z,exitflag]=fminsearch(f,[2.5,3.5],opt)
运行后出错
Input argument "y" is undefined.
Error in ==> fminsearch at 175
fv(:,1) = funfcn(x,varargin{:});
请问是什么原因?
我要用matlab中的fminsearch函数求二元函数f（x,y）=1/((x-1)^2+0.16)+1/((x-1)^2+0.16)的极值只这是我写的程序：f=@(x,y) 1./((x-1).^2+0.16)+1./((y-4).^2+0.16);x=-1:0.1:3;y=3:0.1:5;[X,Y]=meshgrid(x,y);z=f(X,Y);mesh(X,Y,z);opt=optim
第一行函数：
f=@(x) 1./((x(1)-1).^2+0.16)+1./((x(2)-4).^2+0.16);
matlab 默认矩阵形式的
f=@(x,y) 1./((x-1).^2+0.16)+1./((y-4).^2+0.16);
x=-1:0.1:3;
y=3:0.1:5;
[X,Y]=meshgrid(x,y);
z=f(X,Y);
mesh(X,Y,z);
opt=optimset('display','iter');
[xy,z,exitflag]=fminsearch(f,[2.5,3.5],opt)