| Author |
Comment/Response |
David C. Ng
|
 08/29/00 1:57pm
After evaluation of a time varying function, is there a quick method of getting the frequency information?
I have tried the Fast Fourier Transform example from the mathematica book, however, it not obvious how the example could be used for other problems. The frequency axis of the plot is the biggest problem, does it need to be normalized and if so how?
y[t_] = Sin[2 Pi 100 t]*Sin[2 Pi 15 t];
data = Table[y[t*20], {t, 0, 20, 1}];
ListPlot[Abs[Fourier[data]], PlotJoined -> True,
PlotRange -> All]
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