Finding Of Same Values in Matrix

Hi everbody

I have a matrix includes 1724 values, i want to find which elements are same in this matrix (For ex. 25. and 426. values are same etc.)

How can i make this?

Thanks..

Answer 1

[Image Analyst]

What about using unique and a brute force approach:

m = randi(10, 1, 100) % Sample data.
allValues = unique(m); % Find unique numbers.
for k = 1 : length(allValues)
  thisValue = allValues(k);
  indexes{k} = find(m == thisValue);
  fprintf('The number %f is found at indexes : ', thisValue);
  fprintf('%d ', indexes{k});
  fprintf('\n');
end
% celldisp(indexes)

[Volkan Yangin]

Thank you for answer, Image Analyst.

Answer 2

[Andrei Bobrov]

a - your array;

b = unique(a);
[~,idx]  = ismember(a,b);

[Volkan Yangin]

Thank you, Andrei Bobrov.