I've shared a document with you:
plot.png
http://docs.google.com/leaf?id=0B_J5_yv8GrERYWRhZjU4NDItMmMyOS00ZGIxLWE2ZDUtMDFiYTY3MzliMzhk&hl=en&invite=CI2a3aYC
It's not an attachment -- it's stored online at Google Docs. To open this
document, just click the link above.
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and provide commented, minimal, self-contained, reproducible code.