[pstricks] Plotting Equations

[Patrick Drechsler]

"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.
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