# I got an error as Function definitions are not permitted in this context.

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vetri veeran on 20 Oct 2014
Commented: Jan on 20 Oct 2014
This is my code, I want to compute threshold of an image.I copied this code from internet.I am getting some problem in function definition. How to overcome this. Thanks in advance.
function level=isodata(I)
I = im2uint8(I(:));
% STEP 1: Compute mean intensity of image from histogram, set T=mean(I) [counts,N]=imhist(I); i=1; mu=cumsum(counts); T(i)=(sum(N.*counts))/mu(end); T(i)=round(T(i));
% STEP 2: compute Mean above T (MAT) and Mean below T (MBT) using T from % step 1 mu2=cumsum(counts(1:T(i))); MBT=sum(N(1:T(i)).*counts(1:T(i)))/mu2(end);
mu3=cumsum(counts(T(i):end)); MAT=sum(N(T(i):end).*counts(T(i):end))/mu3(end); i=i+1; % new T = (MAT+MBT)/2 T(i)=round((MAT+MBT)/2);
% STEP 3 to n: repeat step 2 if T(i)~=T(i-1) while abs(T(i)-T(i-1))>=1 mu2=cumsum(counts(1:T(i))); MBT=sum(N(1:T(i)).*counts(1:T(i)))/mu2(end);
mu3=cumsum(counts(T(i):end));
MAT=sum(N(T(i):end).*counts(T(i):end))/mu3(end);
i=i+1;
T(i)=round((MAT+MBT)/2);
Threshold=T(i);
end
% Normalize the threshold to the range [i, 1].
level = (Threshold - 1) / (N(end) - 1);
Jan on 20 Oct 2014
The most important details are not explained directly:
1. Where did you insert this code.
2. A copy of the complete error message is important usually.

Jan on 20 Oct 2014
Function definitions are not allowed in the command line and not inside scripts. This topic has been discussed frequently in this forum and searching for the error message will reveal, how function files are created: They start with the keyword "function".

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