Services & Resources / Wolfram Forums
MathGroup Archive
*Archive Index
*Ask about this page
*Print this page
*Give us feedback
*Sign up for the Wolfram Insider

MathGroup Archive 2002

[Date Index] [Thread Index] [Author Index]

Search the Archive

RE: How to find and plot real roots?

  • To: mathgroup at
  • Subject: [mg33572] RE: [mg33566] How to find and plot real roots?
  • From: "David Park" <djmp at>
  • Date: Mon, 1 Apr 2002 02:02:04 -0500 (EST)
  • Sender: owner-wri-mathgroup at


Use the RealOnly standard package.



Plot[x^(1/3)*(3 + x)^(2/3), {x, -2, 2}];

works without any error messages.

The problem with the RealOnly package is that, once you load the package,
you can't turn the feature off without quitting the kernel. Ted Ersek has a
package on MathSource called SwitchableRealOnly that allows you to turn the
real only feature on and off and is somewhat more robust in other ways.

David Park
djmp at

> From: Chitchanok Carlen [mailto:anok at]
To: mathgroup at
> How does one find the real root, for example:
> (-1)^(1/3) in Mathematica ?
> Also, I want to plot x^(1/3)*(x+3)^(2/3), but the fact that
> Mathematica doesn't
> know which roots to pick causes errors in the Plot function.  How
> to force
> it to find real roots?
> Thanks.

  • Prev by Date: Re: How to find and plot real roots?
  • Next by Date: HELP! Strange evaluations
  • Previous by thread: Re: How to find and plot real roots?
  • Next by thread: Length of monotonic sequencies