[pstricks] a problem with \psplotDiffEqn

[Herbert Voss]

Andrzej J. Maciejewski schrieb:
> Dominique,
> I have tried - it does not work - and this is why I ask - if there is
> a way
> to make it works.
> The purpose is obvious - when you try to make a phase portrait of a
> vector
> field, then it is instructive to denote a direction how in which the
> phase
> curves turn.
\documentclass{article}
\usepackage{pstricks-add}
\begin{document}
%
\def\Func{ neg }
%
\psset{method=rk4,plotpoints=10,linecolor=blue,linewidth=0.5pt}
\begin{pspicture}(0,-0.5)(8,4)
\psplotDiffEqn[arrows=->,ArrowInside=->]{0}{8}{4}{\Func}
\end{pspicture}

\end{document}


Herbert