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MathGroup Archive 2004

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extracting powers and coefficients from a polynomial

  • To: mathgroup at smc.vnet.net
  • Subject: [mg49040] extracting powers and coefficients from a polynomial
  • From: "AngleWyrm" <no_spam_anglewyrm at hotmail.com>
  • Date: Tue, 29 Jun 2004 04:50:22 -0400 (EDT)
  • Sender: owner-wri-mathgroup at wolfram.com

I have made a formula that produces a polynomial expansion, and I wish to
extract the powers and coefficients into a list.

Expand[(Sum[x^i, {i, 6}])^3]
  1x^3 + 3x^4 + 6x^5 + 10x^6 + 15x^7 + 21x^8 + 25x^9 + 27x^10 + 27x^11 + 25x^12
+ 21x^13 + 15x^14 + 10x^15 + 6x^16 + 3x^17 + 1x^18

How do I make a table of the powers and coefficents?
3, 1
4, 3
5, 6
6, 10
....

-- 
AngleWyrm
The C++ hat random selection container:
http://home.comcast.net/~anglewyrm/hat.html


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