[pstricks] Parameterized graphics?

Johan Ekh ekh.johan at gmail.com
Fri Dec 28 13:32:22 CET 2007

Hi all,
I try to create a parameterized illustration, i.e. a picture that can be
modified by changing the numerical values of some user defined parameters.
I'd like to use constructs such as

\def\var1{174.2 6.5 sub 2 div }

but I get an error when running latex.

Is it possible to do something like this in pstricks?

Best regards,
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