Error using fcnchk (line 106) FUN must be a function, a valid string expression, or an inline function object. Error in fminsearch (line 162) funfcn = fcnchk(fun​fcn,length​(varargin)​);

Hi,i'm new,it's urgent!

i have this problem: i created a function

 function [ q ] = minimizza_x_tau(tc);

 load('datinuovi.mat')

 fsamp=50;

 N=length(Datitermocoppia) ;

 t=[0:1/fsamp:N/fsamp-1/fsamp];

 salto=max(Datitermocoppia)-min(Datitermocoppia);

 y=salto.*(1-exp(-t./tc));

 y2=rot90(y);

 diffe=(Datitermocoppia-y2).^2;

 q=sum(diffe); 

 end

when i call the function from the script for example with

 tc=2;
 [taunew]=minimizza_x_tau(tc);

it works, but it is not i have to do.

i have to do a minimization as it:

tc=2;
[q]=fminsearch(minimizza_x_tau(tc),0.24);

If i do that it says me ERRORS above.

you know why? i don't know if put tc=2 is right i put them for example.

thank you

[Walter Roberson]

http://www.mathworks.com/matlabcentral/answers/29922-why-your-question-is-not-urgent-or-an-emergency

Answer 1

[Matt J]

You need to pass a handle to the objective function

[q]=fminsearch(@minimizza_x_tau,0.24);