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MathGroup Archive 1999

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Re: New user question

  • To: mathgroup at
  • Subject: [mg20395] Re: New user question
  • From: "Kevin J. McCann" <kevin.mccann at>
  • Date: Tue, 26 Oct 1999 00:32:50 -0400
  • Organization: Johns Hopkins University Applied Physics Lab, Laurel, MD, USA
  • References: <7uefh0$>
  • Sender: owner-wri-mathgroup at

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0.6786044041487268 +  1.1753773062255988*I

Mathematica doesn't know how to plot a complex number with Plot, only reals. Try

Plot[{Re[x^(1/3)],Im[x^1/3]},{x,-5,5}] ;


Kevin J. McCann
Johns Hopkins University APL
Johns Hopkins Road
Laurel MD 20723-6099

Thomas Moriarty <moriarty at> wrote in message
news:7uefh0$277 at
> I have just begun to use/learn Mathematica.  One of the first things I
> tried was to Plot[x^(1/3),{x,-5,5}] and got error messages indicating that
> the negatives^(1/3) were not machine level real numbers (or close to
> that) - the positive side displayed ok.
> What am I doing wrong?
> Thanks

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