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Apple Reference & Presen…rary 5 (Internal Edition)
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Apple R&P Lib Internal v5.0.iso
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6-Developer Demos
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Developer Demos-Ed.
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Math CAD Demo
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Anharmonic
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Text File
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1989-05-23
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820b
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36 lines
.MCD 30002 0
.CMD PLOTFORMAT logs=0,0 subdivs=1,1 size=5,15 type=l
.CMD FORMAT rd=d ct=10 im=i et=3 zt=15 pr=3 mass length time charge
.CMD SET ORIGIN 0
.CMD SET TOL 0.001000
.CMD MARGIN 0
.CMD LINELENGTH 68
.CMD SET PRNCOLWIDTH 8
.CMD SET PRNPRECISION 4
.TXT 0 0 1 24
a1,24,24,24
ANHARMONIC OSCILLATIONS
.TXT 0 35 1 32
a1,32,32,37
Over a mesh of N points from a to -a
.EQN 1 -35 1 10
N:100
.EQN 0 14 1 12
i:1;N
.EQN 0 14 1 10
a:3.1
.EQN 1 4 3 23
x[i:a*(2*i/(N+1)-1)
.EQN 1 -32 2 9
t[0:0
.EQN 0 16 2 9
x[0:a
.TXT 3 -16 2 60
a2,60,60,134
We compute the times at which these points are reached by an
oscillator having a cosine potential energy, and plot their trajectory.
.EQN 3 0 5 34
t[i:t[(i-1)+a/\|(cos(x[i)-cos(a))
.EQN 0 36 8 30
a&-a&x[i{1,1,6,25,d}@t[N&0&t[i