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MathGroup Archive 2006

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General--How to use "CoefficientList" command to get a matrice from a polynome?

  • To: mathgroup at smc.vnet.net
  • Subject: [mg69191] General--How to use "CoefficientList" command to get a matrice from a polynome?
  • From: abdou.oumaima at hotmail.com
  • Date: Fri, 1 Sep 2006 06:41:32 -0400 (EDT)
  • Sender: owner-wri-mathgroup at wolfram.com

I'm trying to do the following:
First of all, I have this polynome Psid[[n]]= (-1)^n Psip[[n]] + ksi Sum[M[[n',n]] . Psip[[n']], {n',0,CN}] + 0(ksi²). I need to get the matrix M.

I put:

CN=3;
Psip={1,0,0};
Psid={1.0000000000000000000 - 0.9443595442280599 ksi, 0.6356361712260359 ksi, 0.06956731675750103 ksi};
M = CoefficientList[Psid, ksi].

But it doesn't resolve me the problem :-(

What to do please to find the M matrix.

Any suggestion Please.
Cheers.
Lian. 







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