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 Demos		 Source Code of fours.num Document
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` Calculate square and sawtooth waves
` as sums of sine waves
x = 0..2*pi len 200 ` one period
y = 0 ` initial square
z = 0 ` initial sawtooth
for n = 1 to 21
   w = sin(n*x)/n ` current term
 if odd(n)
   y += w ` square: accumulate odd orders
 z += w ` sawtooth: accumulate odd orders
 else
   z -= w ` sawtooth: accumulate even orders
 refresh ` update viewers
 wait 1  ` wait 1 sec
 
 Demos
Demos		 Copyright © 2004 KEDMI Scientific Computing. All Rights Reserved. Document 
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