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Re: coefficients but not from polynomial (variables does

  • To: mathgroup at smc.vnet.net
  • Subject: [mg98008] Re: [mg97968] coefficients but not from polynomial (variables does
  • From: Bob Hanlon <hanlonr at cox.net>
  • Date: Fri, 27 Mar 2009 05:39:24 -0500 (EST)
  • Reply-to: hanlonr at cox.net

Cases[a = Sin[x*Pi] + Sin[y], _Symbol?(! NumericQ[#] &), Infinity]

{x,y}


Bob Hanlon

---- magdamoczydlowska at gmail.com wrote: 

=============
Dear All,

Probably my question is very simple. Suppose that we have expression
a= Sin[x]+Sin[y]. I would like receive variables from which this
expression is dependent, so in this case {x,y}. The Variables does not
work of course in this because it is not a polynomial and it gives me
{Sin[x],Sin[y]}. Do anyone know how to solve my problem.

I would be very grateful for quick response.

Magdalena




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