How do I compare the values ​​of a matrix?

Hi there, this is my really complex code. With the matrix named as meanbasket, wich is a matrix 21x7 I have to check when a values is repeted in another columns

%this is for find the correct folder in my disk
srcFile = dir('C:\Users\agnes\Pictures\POST PROCESSING 4\PP4 TGC-MED RD 100\*.dcm');
pathname = ('C:\Users\agnes\Pictures\POST PROCESSING 4\PP4 TGC-MED RD 100\');

% i'm defining the images
numberofimages = 21; 
numberofroi = 7;

% I'm working on a reference images for finding some ROI, that will be need
% for create the matrix 
I=dicomread('2');
imshow(I)

R = nan(numberofroi,4);
masks=cell(numberofroi,1);

for nr = 1:numberofroi
    h = drawrectangle(gca); wait(h); 
    R(nr,:)=h.Position;
    masks{nr}=h.createMask;
end
roibasket = cell(numberofroi,numberofimages);
meanbasket = nan(size(roibasket));  
for ni = 1:numberofimages
    for nr = 1:numberofroi
        filename=(num2str(ni));       
        
        pileofimages=dicomread(strcat(pathname,filename));
        info=dicominfo(strcat(pathname,filename));
        
        roibasket{nr,ni} = imcrop(pileofimages,R(nr,:));
        meanbasket(nr,ni) = mean( pileofimages(masks{nr})  );    %meanbasket is my 7 * 21 matrix, where the values ​​are the averages of the ROIs found earlier
        %FROM NOW I DON'T KNOW HOW TO CONFRONT THE VALUES OF MY MATRIX
    end
end

[Image Analyst]

What do you mean by "CONFRONT" or "compare"?

[HelpAStudent]

To check if the value of, for exemple, first row and column is the same of the value of the second row and third column

Answer 1

[yanqi liu]

may be use the diff from one to another, and compare

[HelpAStudent]

How?