[pstricks] [PostScript] repeat-loop

[Goebel, Juergen, OPE26]

Hi,

it's me again with a new question regarding PS-programming.
I'm trying to create a simple repeat-loop using the following
code-fragment:


\documentclass{scrartcl}
\usepackage{pstricks}
\usepackage{pst-plot}
\begin{document}
 \psset{unit=1mm}
 \begin{pspicture}(90,30)
     \pstVerb{%
        /dc 0.2 def
        /kx 12 def
        /ky 12 def
        /pi 3.141529 def
        /rad2deg {57.296 mul } def
        /si {pi mul dup rad2deg sin exch div } def
     }
     \psplot{-45}{45}{%
        /n 0 def
        5
        { n 1 add % <-----------------------
          x kx mul n mul cos
          n dc mul si
          mul
          add
        } repeat
        dc mul 2 mul
        dc add
        ky mul
     }
 \end{pspicture}
\end{document}


The marked line provokes my problem: What do I have
to do to define a loop-index (here: n) that I want to employ
in the body of the loop?

Regards,

Jürgen
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