[pstricks] Plotting Equations

[Juergen Gilg]

What about

\documentclass[12pt]{article}
\usepackage{pst-plot,pstricks,pstricks-add}
\begin{document}
\begin{pspicture*}(-3,-3.2)(3.5,3.5)
 \psplotImp[linewidth=2pt,linecolor=blue,algebraic](-5,-3)(4,2.4){ 
x^2-x*y+y^2-7}
 \end{pspicture*}
\end{document}

Regards,

Juergen

Patrick Drechsler wrote:
> "Hensh, Richard" <hensh at math.msu.edu> writes:
>
>   
>> Can PSTricks be used to sketch the graph of an equation? For
>> example,
>>
>>         x^2 - xy + y^2 = 7
>>
>> Using Mathematica, I was able to use the ContourPlot function to
>> sketch the graph and then import the object, but I prefer
>> self-contained solutions whenever possible.
>>     
>
> This is only possible if you provide a range of data for X and
> Y. There is no "auto-scaling" in PSTricks or postscript as far as I
> know.
>   

-- 
  jürgen gilg
  austr. 59
  70376 stuttgart

tel       0711-59 27 88
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