error 'Index exceeds matrix dimensions.'

I want to compute the following code but an error which says 'Index exceeds matrix dimensions' appears and I find it puzzling. More to this the 'jj' which suppose to 25 become '1' and 'tcal' changes from 26 to 25.. Here is the code

for ii = 1:length(datafiles);    
%%files will be loaded here%%

 tcal = max(min(time),min(hTime)):dt:min(max(time),max(hTime));
 Sca1 = interp1(time,ssc,tcal); 
 x= cast(calpre, 'double'); 

 kk=1:1:length(x);
 B=repmat(reshape(x(kk),1,1,length(x)),20,40);
M=M(:,:,3);
M1 = permute(M*1000,[2 1]); 
M2= interp1(hTime,M1,tcal);

 for jj = 1:length(tcal);   
h2(:,:,jj)=h(:,:,jj)-B(:,:,jj).*0.001; 
sig2(:,:,jj)=sig1(:,:,jj).*(h2(:,:,jj)./h(:,:,jj));  
C(:,:,jj) = max(sig2(:,:,jj),[],1 
Sca1l = permute(Sca1 ,[3 2 1]);
Sca13(:,:,jj)=interp1(sig1(:,1,jj),Sca1l(:,:,jj),C(:,jj)'); 

 end

end

Any help is highly appreciated

Answer 1

[Matt J]

The DBSTOP command is good for finding errors like these.

[sisay]

Thanks I will try this

Answer 2

[Matt J]

'Index exceeds matrix dimensions.' is nothing too mysterious. It happens when you do things like this:

>> x=1:5

x =

       1     2     3     4     5

>> x(6)
Index exceeds matrix dimensions.