creating arcode like image

2015 1 16
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I'm trying to create an image of alternating black and white stripes. I have the size of the final image, and the size of each white strip (they are all the same width) I'm trying to find a way to do it without using loops.
any ideas?
Thanks

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Image Analyst
Image Analyst 2015-1-16

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You can create one cycle, then use repmat() to replicate it to build up the entire image:
stripeWidth = 10;
imageRows = 423; % Whatever...
imageColumns = 359; % Whatever...
oneCycle = [255*ones(1, stripeWidth), zeros(1, stripeWidth)];
oneLine = repmat(oneCycle, [1, ceil(imageColumns/stripeWidth)]);
wholeImage = repmat(oneLine, [imageRows, 1]);;
% Crop
wholeImage = wholeImage(1:imageRows, 1:imageColumns);
imshow(wholeImage);
axis on;

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