Unable to solve Indexing error in matlab

Sir I am facing this problem..I ave tried a loy but I am not able to solve it. It is showing this error

Index exceeds matrix dimensions.

Error in singha>VALIDATE_Callback (line 504) s2 = std2(cimg(:,:,2));

Error in gui_mainfcn (line 96) feval(varargin{:});

Error in singha (line 42) gui_mainfcn(gui_State, varargin{:});

Error in @(hObject,eventdata)singha('VALIDATE_Callback',hObject,eventdata,guidata(hObject))

Error while evaluating uicontrol Callback

[Stephen23]

What an interesting coincidence... the same homework perhaps?:

http://de.mathworks.com/matlabcentral/answers/213213-what-is-index-exceeds-matrix-dimensions-error

Answer 1

[Stephen23]

Use the debugging tools and check the size of the matrix just before the error occurs:

http://www.mathworks.com/help/matlab/debugging-code.html

http://www.mathworks.com/help/matlab/matlab_prog/debugging-process-and-features.html

It is likely that you will find that the array only has one page (i.e. along the third dimension), so the indexing (cimg(:,:,2) will cause the error because there is no second page to that array.

This may be because you are confusing different image types, which can have different numbers of dimensions. You should read the documentation carefully and check how many dimensions the arrays have:

http://www.mathworks.com/help/matlab/creating_plots/image-types.html

Otherwise the error must be in your algorithm somewhere. Note that without the accompanying .FIG file no one can run the code that you generated using GUIDE.

[Prakash Sharma]

I included the .fig file too with the .m file.

[Stephen23]

When I run the .m file it creates a figure with several buttons and axes. But without when the buttons are pressed it generates an error due to not locating some database.

This would be bset solved by yourself using the standard MATLAB debugging tools. This is quite a complicated project, and you are in the best position to understand its internal flow and algorithm.

There are excellent articles describing how to use the debugging tools, please follow the links that I gave above.

[Prakash Sharma]

sir i have tried different codes,but it still shows same error, i used the following codes in place of for loop in segment call back but i don't get the desired result.

[rows, columns, numberOfColorChannels] = size(test);
%if numberOfColorChannels == 1   
     % It's a gray scale image.  Create a color image from it.
     % cimg = cat(3, test, test, test);
%else    
     cimg = test; % Already RGB, just assign all color channels to cimg.
%end

Sir suggest me the proper codes so that I can complete the code

[Image Analyst]

This is code I gave you in your other question, but you've commented it out for some reason. Please please please decide whether you want to work with a color image or a gray scale image, or both. Which is is? I would think that since it's an mri image you want it to be grayscale. However that's not what you asked in your other question where you asked how to create a color image. Then check what you have and make any conversion if needed.

[Prakash Sharma]

The attached codes are indeed my final codes, I will use grayscale images only. I am facing error in segment callback, how to solve it without changing it into a color image? I used the codes u suggested in segment call back, but it leads into the same error in validate call back section. So is there anyway to solve the error in the segment call back section without changing it into a color image?