[MATLAB基础] 求助关于fminbnd求极值的问题 - MATLAB爱好者论坛-LabFans.com

bleeze2010 · 2015-10-12, 17:28

程序：
syms x1 x2 alfa
y=x1+4*x2;
t=4+2*alfa;
z=subs(y,{x1,x2},{t,t})
[zx]=fminbnd(char(z),0,10)

运行后的错误提示是：
??? Error using ==> inlineeval at 15
Error in inline expression ==> 10*alfa + 20
Undefined function or variable 'alfa'.

Error in ==> inline.subsref at 27
INLINE_OUT_ = inlineeval(INLINE_INPUTS_, INLINE_OBJ_.inputExpr, INLINE_OBJ_.expr);

Error in ==> fminbnd at 212
x= xf; fx = funfcn(x,varargin{:});

Error in ==> lizi_niniudun_1 at 24
[zx]=fminbnd(char(z),0,10)

请问一下这是怎么回事？

2015-10-12, 17:28	#1
bleeze2010 初级会员注册日期: 2015-10-12 帖子: 1 声望力: 0	求助关于fminbnd求极值的问题程序： syms x1 x2 alfa y=x1+4x2; t=4+2alfa; z=subs(y,{x1,x2},{t,t}) [zx]=fminbnd(char(z),0,10) 运行后的错误提示是： ??? Error using ==> inlineeval at 15 Error in inline expression ==> 10*alfa + 20 Undefined function or variable 'alfa'. Error in ==> inline.subsref at 27 INLINE_OUT_ = inlineeval(INLINE_INPUTS_, INLINE_OBJ_.inputExpr, INLINE_OBJ_.expr); Error in ==> fminbnd at 212 x= xf; fx = funfcn(x,varargin{:}); Error in ==> lizi_niniudun_1 at 24 [zx]=fminbnd(char(z),0,10) 请问一下这是怎么回事？