Execute MATLAB/Octave Online

figure;
img=imread('grapes2.jpg');
imshow(img); pause;

histcor=zeros(16);
h=hist(histcor);
for i=1:5
    sel=imcrop(img);
    m=hist(double(sel));
    imshow(sel); pause;
    h=updatehist(h,round(m));
end

mesh(histcor); pause;