[pstricks] multido again

Zbigniew Nitecki zbigniew.nitecki at tufts.edu
Thu Dec 4 22:15:24 CET 2008

I am trying to draw a series of arcs joining the same endpoints, with  
successively larger radii of curvature.  The following code returns an  
error indicating that an exclamation point somewhere is being read as  
a missing number (treated as zero).  What am I doing wrong? (It seems  
not to matter whether or not I put an exclamation point before the  
lone \rt in the first angle specification for the arc).

			\psarc(!0 \rt\space 2 mul cos neg)%
				{!\rt\space cos 2 mul}{\rt}{!180 \rt\space sub}

Zbigniew Nitecki
Department of Mathematics
Tufts University
Medford, MA 02155

Office    (617)627-3843
Dept.    (617)627-3234
Dept. fax    (617)627-3966

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