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function n = normalize(data)
	if (size(data, 1) == 1)
		data = data';

	_min = repmat(min(data), size(data, 1), 1);
	_max = repmat(max(data), size(data, 1), 1);
	equals = (_min == _max);
	if any(any(equals))
		_min = _min .* ~equals;
		_max = _max .* ~equals + ones(size(_max)) .* equals;
	end
	n = (data - _min) ./ (_max - _min);
end