It doesn't. I never claimed it will. The data file I use, I originally seeded by hand.

If I have given the suggestion the code I posted is something you can just download and run everywhere, I've given the wrong impression. I just posted code that runs daily on my system, and that was developped purely to run on my system. It was posted mainly for educational and illustrational purposes. It should run on many systems, but some assembly will be required.

Abigail