How i can loop a video until a button is pushed or a condition is given?

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I have my code already set down. but i am having problems with telling Matlab how I can continues executing the code until the user closes the video, or Give it a condition for stopping.
img = getsnapshot(vid);
figure (2); imagesc(img);
red = img(:,:,1); % Canal Rojo
green = img(:,:,2); % Canal Verde
blue = img(:,:,3); % Canal Azul
a = zeros(size(img, 1), size(img, 2));
just_red = cat(3, red, a, a);
just_green = cat(3, a, green, a);
just_blue = cat(3, a, a, blue);
I= just_red - just_green;
I2=im2bw(I, graythresh(I));
I3= bwareaopen(I2, 100);
I tried with a toggle button, but i a newbie, and i know nothing about programming.
Thanks, Alex
  1 comentario
Stephen23 el 26 de Jul. de 2015
Editada: Stephen23 el 26 de Jul. de 2015
This time I formatted your code for you, but in future you can do this yourself by simply selecting the code and then pressing the {} Code button that you will find above the textbox. And please do not put empty lines between every line of your code: this is a waste of your time and ours.

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Walter Roberson
Walter Roberson el 26 de Jul. de 2015

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