\documentclass[preview,border=12pt]{standalone}
\usepackage{pst-plot}
\psset{polarplot}
\def\RPN#1{2 #1 10 div exp}
\def\Infix#1{2^(#1/10)}
\begin{document}
\begin{pspicture}[showgrid=true](-3,-3)(3,3)
\psplot{2 Pi mul neg RadtoDeg}{2 Pi mul RadtoDeg}{\RPN{x DegtoRad}}
\qdisk(!\RPN{Pi 3 mul 2 div} Pi 3 mul 2 div RadtoDeg PtoC){3pt}
\end{pspicture}\qquad
\begin{pspicture}[showgrid=true](-3,-3)(10,3)
\psplot[algebraic]{2 Pi mul neg}{2 Pi mul}{\Infix{x}}
%\qdisk(<your expression using \Infix goes here>){3pt}
\end{pspicture}
\end{document}
How to draw a point if the angle value and radial function are both given in algebraic (infix) form?
Notes: Both angle and radius must accommodate infix expression such as 3*Pi/2
for the angle and 2^(3*Pi/2/10)
for the radius.
\fnpnode
(frompst-node
) can be adapted to accept thepolarplot
option. – Christoph Sep 18 '13 at 8:33