清空筛选条件
清空筛选条件

Info

此问题已关闭。 请重新打开它进行编辑或回答。

Combining separate files

1 次查看（过去 30 天）
buxZED
buxZED 2011-3-2
关闭： MATLAB Answer Bot 2021-8-20
??? Subscripted assignment dimension mismatch.
Error in ==> fminsearch at 205
fv(:,1) = funfcn(x,varargin{:});
Error in ==> p5final at 95
sig4=fminsearch('P5F',1.5);% minimse the cost function using 'fminsearch' giving
a predicted value for sigma4
i get this error for the coding
sig4=fminsearch('P5F',1.5);% minimse the cost function using 'fminsearch' giving a predicted value for sigma4
c44=exp(-z.^2/(2*(sig4)^2));% Use global value for 'z' and predicted value for sigma4 to find a forth predicted value for average plume concentration ratio 'c'
e4=c-c44;% calculate prediction error between global c (average plume concentration ratio) and the forth predicted plume concentration
>> P5F is a another file codes are
function J=P5F(Sig)
global c2 z
J=0;
for k=1:201;
s1=c2*(k);
s2=exp(-z(k)^2/(2*(Sig)^2));
J=J+(s1-s2)^2;
end

此问题已关闭。

回答（2 个）

Walter Roberson
Walter Roberson 2011-3-2
The argument to fminsearch must be a function handle, not a string. Use @P5F instead of 'P5F'
  2 个评论
buxZED
buxZED 2011-3-2
still gives the same error
?? Subscripted assignment dimension mismatch.
Error in ==> fminsearch at 205
fv(:,1) = funfcn(x,varargin{:});
Error in ==> Q5 at 99
sig4=fminsearch(@P5Function ,1.5);% minimse the cost function using
'fminsearch' giving a predicted value for sigma4
Matt Tearle
Matt Tearle 2011-3-2
Actually, you *can* use a string... but you *should* use a function handle.
Matt Tearle
Matt Tearle 2011-3-2
What are your globals c2 and z? Not having access to them, I hard-coded in a scalar for c2 and a 201-element vector for z, and it worked fine for me.
While we're here, don't use globals. Do this instead:
function J=P5F(Sig,c2,z)
[etc]
Then, in p5final
c2 = <something>;
z = <something>;
f = @(sig) P5F(sig,c2,z)
sig4=fminsearch(f,1.5)
See the doc for more information on this use of anonymous function handles.

此问题已关闭。

标签

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by