[pstricks] Avoid lines in psplotImp

[Martin Chicoine]

Is there a way to avoid the superfluous lines in this example?

 

\documentclass[11pt]{article}

\usepackage{pst-func,pstricks-add}

\psset{algebraic}

                                                

\begin{document}

 

\begin{psgraph}(0,0)(-6,-6)(8,6){8cm}{!}

  \psplotImp[linecolor=red](-6,-6)(0,0){x^3*y^2-3*x^2*y^3-(16)}

  \psplotImp[linecolor=violet](0,-6)(8,0){x^3*y^2-3*x^2*y^3-(16)}

\end{psgraph}

 

\end{document}

 

Thanks,

 

Martin.

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