How to plot the frequency spectrum with scipy

import numpy as np. import matplotlib.pyplot as plt. from scipy import fft. Fs = 200 # sampling rate. Ts = 1.0/Fs # sampling interval. t = np.arange(0,1,Ts) # time vector. ff = 20 # frequency of the signal. zero = np.zeros(10) zeros = np.zeros(Fs/ff/2) ones = np.ones(Fs/ff/2) count = 0 ................
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