[pstricks] Plotting Equations

[Herbert Voss]

Juergen Gilg schrieb:
> 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}


correct, but needs pst-func:

\documentclass[12pt]{article}
\usepackage{pst-func}
\begin{document}
\begin{pspicture*}[showgrid=true](-4,-4)(3.5,4)
\psplotImp[linewidth=2pt,linecolor=blue,
	algebraic](-4,-3)(4,3.5){ x^2-x*y+y^2-7}
\end{pspicture*}
\end{document}


Herbert