[pstricks] Modifying psPolynomial

[John Frampton]

Herbert,

Your solution to McGarry's problem is elegant.

Could you give some pointers on how to learn to write postscript code?
I printed out the postscript manuals, but ended up being overwhelmed. 
Is there a useful "Writing Postscript Code: The Basics" book?

Thanks,
John Frampton

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