无法求极值的多元函数？

gerry

第一次用fmin，简化函数及错误提示如下，看不出问题出在哪里，请各位帮忙

fua =

(500*x(3)*x(2)^2-107/10)^2+(25/2*x(2)-9)^2+(1000/89*x(1)-824/89)^2

>> x0
x0 =
    0.8240    0.7200    0.0413

>> fminunc(fua,x0)

??? Error using ==> optimfcnchk
If FUN is a MATLAB object, it must have an feval method.
Error in ==> fminunc at 192
   funfcn = optimfcnchk(FUN,'fminunc',length(varargin),funValCheck,gradflag,hessflag);

>> fminsearch(fua,x0)

??? Error using ==> fcnchk
If FUN is a MATLAB object, it must have an feval method.
Error in ==> fminsearch at 178
funfcn = fcnchk(funfcn,length(varargin));

xjzuo

这种简单问题建议 help fminunc,  help fminsearch, 自己看看相信就能解决．
提示：先定义你的函数为inline函数即可．