Question

如何用MATLAB求一个函数的最大值和最小值

Answer 1

>> [x,fval] = fminbnd('x*sin(2*x-1)',0,2)
x =
0.2601
fval =
-0.1201
当x取0.2601时，函数有最小值-0.1201
当然答案是近似值

Answer 2

引用一骑当后的回答：
>> [x,fval] = fminbnd('x*sin(2*x-1)',0,2)
x =
0.2601
fval =
-0.1201
当x取0.2601时，函数有最小值-0.1201
当然答案是近似值

% @(x) 注意要加这个运算符
>> [x,fval] = fminbnd(@(x) x*sin(2*x-1),0,2)

x =
0.2601
fval =
-0.1201
当x取0.2601时，函数有最小值-0.1201
当然答案是近似值