Am 05.12.20 um 18:16 schrieb Boris Dorestand:
I have 16 values of the period sequence 1, 2, 4, 8, 1, 2, 4, 8, ... I
compute its fourier transform using
from scipy import fft, ifft
x = [1,2,4,8,1,2,4,8]
fft(x)
array([ 30. +0.j, 0. +0.j, -6.+12.j, 0. +0.j, -10. +0.j, 0. +0.j,
-6.-12.j, 0. +0.j])
Now how can I plot these values? I would like to plot 16 values. What
do I need to do here? Can you show an example?
Usually, for the FFT of real input data, you plot only the magnitude or
square of the complex array, and usually on a logscale. So:
import pylab
import numpy as np
fx = fft(x)
pylab.semilogy(np.abs(fx))
pylab.show()
Christian
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