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| import numpy
import matplotlib.pyplot as plt
from matplotlib.pyplot import *
from scipy.fftpack import fft
x=numpy.genfromtxt(r'C:\Users\souag\Desktop\pywav\sinus.csv', delimiter=',')
time=x[:,][:,0]
sine=x[:,][:,1:5]
print (sine[0:30])
time=time-time[0]
plt.subplot(2,1,1)
plt.plot(time,sine,'r')
axis([0,2,-2,4])
grid()
T=200.0
fe=10.0
Te=1/fe
N=int(T*fe)
tfd=numpy.fft.fft(sine)
f=numpy.arange(0,N)
figure(figsize=(10,4))
vlines(f,[0],numpy.absolute(tfd),'b')
xlabel('f')
ylabel('C')
axis([0,20,0,10])
grid() |
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