HI friends.I have a question:what is the difference between imshow & imagesc in this code and why the time reduce??

clear all;
%  close all;
 clc 
tic
for n=1:100
    disp(n)
           for i=1:50
             for j=1:50
               matrix(5*i-4:5*i ,5*j-4:5*j)=rand;
%  matrix(10*i-9:10*i ,10*j-9:10*j)=rand;
%                  matrix(4*i-3:4*i ,4*j-3:4*j)=rand;

                end
            end
              imshow(matrix);
               imagesc(matrix);
  %               colormap(gray)
  %               colorbar
  %           matrix=100*floor(5*matrix);
  %           matrix=83*matrix;
          randmatrix{n}=matrix;
  %            matrix=randmat{n};
  %            imshow(matrix)

%           matrix=floor(4*matrix);
%           matrix=83*matrix;
%         randmatrix{n}=matrix;
end

   toc

[Guillaume]

There two different functions, so I wouldn't expect them to take the same time.

Isn't your question answered simply by looking at the documentation?

I would recommend you reduce the clutter in question by removing all these useless comments.

Answer 1

[sloppydisk]

This was answered here: https://mathworks.com/matlabcentral/answers/72130-what-s-the-difference-between-imagesc-and-imshow .

Guillaume's edit: fixed link