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MathGroup Archive 2006

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Re: Beginner--[Please Help]How to get coefficient list issued from a Series Command

  • To: mathgroup at smc.vnet.net
  • Subject: [mg70154] Re: [mg70141] Beginner--[Please Help]How to get coefficient list issued from a Series Command
  • From: Bob Hanlon <hanlonr at cox.net>
  • Date: Fri, 6 Oct 2006 01:57:54 -0400 (EDT)
  • Reply-to: hanlonr at cox.net

k = {a1 + b1*x + c1*x^2, a2 + b2*x + c2*x^2, 
   a3 + b3*x + c3*x^2};

Transpose[CoefficientList[#, x]&/@k]

{{a1, a2, a3}, {b1, b2, b3}, {c1, c2, c3}}


Bob Hanlon

---- abdou.oumaima at hotmail.com wrote: 
> Greeting,
> 
> I've a list issued from power series like : K={a1+b1 x +c1 x^2 , a2+b2 x +c2 x^2, a3+b3 x +c3 x^2}
> I need te have a1, a2 and a3.
> Then b1,b2 and b3.
> And  c1,c2 and c3.
> I need to use all those coefficients in a Sum Command. How to do that please?
> 
> Cheers
> 
> 
> Link to the forum page for this post:
> http://www.mathematica-users.org/webMathematica/wiki/wiki.jsp?pageName=Special:Forum_ViewTopic&pid=14153#p14153
> Posted through http://www.mathematica-users.org [[postId=14153]]
> 
> 

--

Bob Hanlon
hanlonr at cox.net



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