Spectrum Analysis (Fourier)

08152018, 07:54 PM
(This post was last modified: 08152018 09:31 PM by toshk.)
Post: #1




Spectrum Analysis (Fourier)
compile compile compile compile!!!!
The plot you see after a successful run is Magnitude Plot; For Phase plot; plot D3; I Spect() Under this notation in F0 with Xrange of a period or integer multiple of T. eg. F0 for sin(X) in Xrng 0 to 2*pi or pi to +pi eg. 1*Heaviside(X)+1*Heaviside(X1) Xrng 0 to 2; this defines PiecewiseFunction of X=1 between 0 and 1; X=0 elsewhere repeating at a T=2; II spect(lowerLimit, Period) Under this notation plot in F0; don't care about Xrng but specify the range in function call. eg. F0 for sin(X); call function spect(0,2*pi) OR spect(pi,2*pi); bcos sinX T=2pi always. the ~Fourier plot can be found under Function app. Press plot under Function App. eg. 1*Heaviside(X)+1*Heaviside(X1); PiecewiseFunction of X=1 between 0 and 1; X=0 elsewhere; function call spect(0,2) for T=2; check plot on Function App; http://www.hpmuseum.org/forum/thread453...#pid102189 complex function: COS(X)+sin(2X)+COS(3X+.11)+2 at F0 fo(rads/s) for this function is gcd(1,2,3) in exact CAS; hence T=2*pi/gcd(1,2,3) under I notation plot F0 for Xrng 0 to T or 0 to integer*T; then Spect(); under II plot F0 then spect(0,T) 

08162018, 06:27 AM
Post: #2




RE: Spectrum Analysis (Fourier)
Great, thank you, toshk
Best, Aries 

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