Dimension mismatch error while using FMINSEARCH

I keep getting this error message.

??? Subscripted assignment dimension mismatch.

Error in ==> fminsearch at 205
fv(:,1) = funfcn(x,varargin{:});

[Matt Tearle]

This contains even less information than the duplicate (2358), although the title is more descriptive. Any chance you can kill this one, and change the title of 2358? (Or kill 2358 and give more info here.) Otherwise we're going to end up with parallel discussions.

Answer 1

[Paulo Silva]

funfucn is returning more lines than you have in the variable fv

[buxZED]

function J=P5Function(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

above is a seperate M. file

below is what im trying to execute

tryed like 100 times, but cant find a errer

sig4=fminsearch('P5Function',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=c2-c44;% calculate prediction error between global c2 (average plume concentration ratio) and the forth predicted plume concentration

pleese point me in the right derection

Answer 2

[buxZED]

any help?

Answer 3

[Walter Roberson]

Answered in your duplicate question #2358

[buxZED]

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

[Walter Roberson]

At the beginning of your P5Function, put in

disp(size(Sig))

and at the end put in

disp(size(J))

fminsearch documents that the function needs to return a scalar output, but does not document what the array size passed in will be exactly. I believe that the array size passed in should be the same as the array size of the initial value, but it doesn't hurt to check experimentally.