[pstricks] \parabola

[mokaude]

Le 22 sept. 05 à 18:09, Herbert Voss a écrit :

> mokaude wrote:
>
>
>> I would like to use \parabola to draw a parabola that passes  
>> through  (-1,0) with a maximum at (1,3).
>> It is possible to draw this parabola for x greater than 1 ? lower   
>> than -1 ?
>> Should I use \psplot instead ?
>>
>
> maybe an option, but you also can overwrite the uneeded
> area -1..+1
>
> Herbert
>
>
> \documentclass{minimal}
> \usepackage{pst-plot}
> \begin{document}
>
> \begin{pspicture*}(-3,-3)(5,5)
>     \psaxes(0,0)(-2,-2)(4,4)
>     \parabola(-1,0)(1,3)
> \end{pspicture*}
>
> \begin{pspicture*}(-3,-2)(5,5)
>     \parabola(-2,-6)(1,3)\psframe*[linecolor=white](-1,-3)(1,5)
>     \psaxes(0,0)(-2,-2)(4,4)
> \end{pspicture*}
> \end{document}


Thank you for your response.

But it's not really what I have to do. I have bad expressed myself.

With the command \parabola(-1,0)(1,3), the parabola is drawn for x in  
[-1;3].
What I would like to do, is to draw the same parabola for x in  
[-2;5], for example.
Is this possible with the \parabola command ?

mokaude
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