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MathGroup Archive 2006

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Re: newton raphson plot

  • To: mathgroup at smc.vnet.net
  • Subject: [mg70518] Re: [mg70474] newton raphson plot
  • From: Murray Eisenberg <murray at math.umass.edu>
  • Date: Wed, 18 Oct 2006 04:17:55 -0400 (EDT)
  • Organization: Mathematics & Statistics, Univ. of Mass./Amherst
  • References: <200610170659.CAA01986@smc.vnet.net>
  • Reply-to: murray at math.umass.edu

Your use of z as variable makes me suspect you are using Newton-Raphson 
for complex-valued functions of a complex variable.

If so, the issue is what you mean by "plotting" the function!  There are 
many possible representations.  David Park's Cardano3 package makes 
possible a number of these representations.

If, though, your variable is real, then are you asking not for a plot of 
the function itself, but rather the related plot showing the 
Newton-Raphson iterates?

bjarke wrote:
> Hi everyone.
> 
> We working on newton-raphson methods in mathematica. We want to plot the funktion f[z_] = z^3 - 1 how do we do it??
> 
> All help is good help :-)
> 
> 

-- 
Murray Eisenberg                     murray at math.umass.edu
Mathematics & Statistics Dept.
Lederle Graduate Research Tower      phone 413 549-1020 (H)
University of Massachusetts                413 545-2859 (W)
710 North Pleasant Street            fax   413 545-1801
Amherst, MA 01003-9305


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