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-rw-r--r--doc/images/polyline2.svg.scm8
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diff --git a/doc/images/polyline2.svg.scm b/doc/images/polyline2.svg.scm
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+++ b/doc/images/polyline2.svg.scm
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+(import (srfi srfi-1)) ; for iota and list-tabulate
+
+(polyline
+ (map cons
+ (iota 100 0 10)
+ (list-tabulate 100
+ (lambda (n)
+ (+ 100 (* n (expt -1 n)))))))