Matlab create image

% Define A as your size matrix, this example uses 200x200 of 0's
A = uint8(zeros(200,200));

% loop over M x N with two for's
for row 1:size(A,1)
	for col 1:size(A,2)
    	% your logic here, example:
        A(row,col) = 255
	end
end

% image matrix is now 200x200 of 255, using imshow will display a white image.
% imshow(A)

Source: uk.mathworks.com

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