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sigprc09
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1997-07-08
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819b
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25 lines
; This batch file creates a plot of the power spectrum of
; the simulated signal used in the example from Chapter 13,
; "Signal Processing", of _Using IDL_, with a 30 cycle/second
; periodic component added.
N = 1024 ; number of time samples in data set
delt = 0.02 ; sampling interval in seconds
T = delt * FINDGEN(N) ; vector of discrete times
f1 = 5.0 / ((n-1)*delt)
f2 = 0.5 / ((n-1)*delt)
R = SIN(2*!PI*f1*T) * SIN(2*!PI*f2*T)
PLOT_3DBOX, T, R, -FLOAT(HILBERT(R)), $
AX=40, AZ=15, XTICKS=5, XCHARSIZE=2, XTITLE = 'time in seconds', $
YTICKS=2, YCHARSIZE=2, YTITLE = 'real', YMARGIN=[4,8], $
ZTICKS=2, ZCHARSIZE=2, ZTITLE = 'imaginary'
XYOUTS, 0.5, 0.95, /NORMAL, ALIGNMENT=0.5, SIZE=1.5, $
'Analytic Signal for r(t) Using Hilbert Transform'