function rot = rot45(im, n)
	NA = ones(n, n);
	for I = 1:n,
		for J = 1:n,
			TRANS = [.7 .7 0; -.7 .7 0; 0 0 1] * [I J 1]';
			if TRANS(1) >= 1
				if TRANS(2) >= 1
					NA(floor(TRANS(1)), floor(TRANS(2))) = im(I, J);
				end
			end
		end
	end
	rot = NA;