[pstricks] Avoid lines in psplotImp

[Herbert Voss]

Martin Chicoine wrote:
> Martin Chicoine wrote:
>   
>>> Is there a way to avoid the superfluous lines in this example?
>>>   
>>>       
>> as shown in the docs ...
>>
>> \documentclass[11pt]{article}
>>
>> \usepackage{pst-func,pstricks-add}
>> \psset{algebraic}
>> \begin{document}
>>
>> \begin{psgraph*}(0,0)(-6,-6)(8,6){8cm}{!}
>>  \psplotImp[linecolor=red](-7,-7)(0,0){x^3*y^2-3*x^2*y^3-(16)}
>>  \psplotImp[linecolor=violet](0,-7)(8,0){x^3*y^2-3*x^2*y^3-(16)}
>> \end{psgraph*}
>>     
\begin{psgraph*}(0,0)(-6,-6)(8,6){8cm}{!}
  \psplotImp[linecolor=violet](-7,-7)(8,0){x^3*y^2-3*x^2*y^3-(16)}
  \psplotImp[linecolor=red](-7,-7)(0,0){x^3*y^2-3*x^2*y^3-(16)}
\end{psgraph*}

Herbert

> Ok, but there is still a line along the y-axis in the second psplotImp (the
> violet one). It becomes problematic if we set linewidth=2pt for example. Is
> there a way to get rid of that one (or any other one that might appear)?
>