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Re: a first-time user question


In[1]:=
<<Miscellaneous`RealOnly`

In[3]:=
Plot[x^(2/3), {x, -1, 0}]

Tomas Garza
Mexico City
----- Original Message -----
From: "Ye Hu" <huye at wharton.upenn.edu>
To: mathgroup at smc.vnet.net
Subject: [mg39377] [mg39352] a first-time user question


> 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.
>
>
>
>




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