[pstricks] log/ln in radial context for circular sliderule
Juergen Gilg
gilg at acrotex.net
Sun May 23 15:53:20 CEST 2010
Dear Carsten,
> $f(x)=-\frac{\ln(x)\times360}{\ln(10)}$ $D_f=[0..10]\subset\mathbf{N}$
>
>
> %% /lograd \i\space ln -360 mul 10 ln div def
\pstVerb{%
/lograd \i\space ln 360 mul 10 ln div neg def
}
for your function.
Note: A logarithmic function is not defined for \i=0 -- however you
start with \i=0...
>
> Even a "simple number" isnt doing it and throwing "! Bad number:
> `logradÂZ(."
Try out the following:
%%%%%%%%
\documentclass{article}
\usepackage{pstricks,multido}
\SpecialCoor
\begin{document}
\multido{\i=1+1}{10}{%
\pstVerb{%
/lograd \i\space ln 360 mul 10 ln div neg def
}
\psline(!4.9 lograd sin mul 4.9 lograd cos mul)(!5.2 lograd sin mul 5.2
lograd cos mul)
}
\end{document}
%%%%%%%%
Hope this helps.
Regards,
Juergen
--
Jürgen Gilg
Austr. 59
70376 Stuttgart
-------------------------------------
Tel 0711.59 27 88
e-Mail gilg at acrotex.net
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