1pBT5bqydKJZ setxyrapport
25 setxunit
7.5 setborder
-5 5 setxrange
-5 5 setyrange
jpegmode
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1 1 settkstep
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2 2 setmkstep
ticks
subticks
marks
traceaxes
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/R {settvar
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0 2 pi mul settrange
gsave
0.75 setlinewidth
continu
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(R) courbepolar
grestore