Re: a first-time user question
- To: mathgroup at smc.vnet.net
- Subject: [mg39376] Re: a first-time user question
- From: nilton.volpato at ig.com.br (Nilton Volpato)
- Date: Thu, 13 Feb 2003 04:53:04 -0500 (EST)
- References: <b2d0su$e65$1@smc.vnet.net>
- Sender: owner-wri-mathgroup at wolfram.com
Use:
Needs["Miscellaneous'RealOnly'"]
Plot[x^(2/3), {x,-1,0}]
This will work.
-- Nilton
"Ye Hu" <huye at wharton.upenn.edu> wrote in message news:<b2d0su$e65$1 at smc.vnet.net>...
> I have a simple (supposedly) question...
>
> I used the following command to draw a plot, but Mathematica could not run
> properly.
>
> Plot[x^(2/3),{x,-1,0}]
>
>
> I know the problem is about calculating (-1)^(1/3) in mathematica. Although
> (-1)^(1/3) = -1,
> mathematica tries to calculate it numerically and gives complex results
> 0.5+0.8i
> How to solve this problem and restrict the solution to be only real numbers?
>
> Thanks very much.