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The Datafile PD-CD 5
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Fourier
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1996-08-20
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224 b
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12 lines
; test of graph
xrange -5 5
yrange -2 2
grid 1 .5
axes 0 0
steps 100
plot 2*(int(x/pi+5)%2)-1
colour red
plot 4/pi*(sin(x)+sin(3*x)/3+sin(5*x)/5+sin(7*x)/7)
colour black
title A sqare(ish) wave and a Fourier approximation.