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MathGroup Archive 2006

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RE: Help !! plot roots of an expression

  • To: mathgroup at smc.vnet.net
  • Subject: [mg72433] RE: [mg72349] Help !! plot roots of an expression
  • From: "David Park" <djmp at earthlink.net>
  • Date: Wed, 27 Dec 2006 06:31:24 -0500 (EST)

It would help if you posted an evaluable example to the group. How could one
possibly find roots for the example that you give?

David Park
djmp at earthlink.net
http://home.earthlink.net/~djmp/

From: mintoo [mailto:varun.tangri at gmail.com]


I have a polynomial. A simple example is like this

(w-w1) (w + 2  q +en^2 +  s w^3) + r
The actual example is more complicated.  It is a function of several
variables e.g. q, en, s, r etc..
I also need to Collect & FullSimplify this expression.
Finally, from that result, I want to plot the roots of this polynomial
(imaginary & real part) vs. q (say) or vs en etc.. other variables can
be given fixed values.

I'll the thankful if you give me hints how to do this!!



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