Python fft frequency spectrum

Frequency spectrum signal python

#A short example to extract the frequency spectrum of a signal
import numpy as np
import matplotlib.pyplot as plot
samplingFrequency  = 100
t=np.arange(0,5,1/samplingFrequency)
signal=np.sin(2*np.pi*t)
fourierTransform = np.fft.fft(signal)/len(signal)
fourierTransform = fourierTransform[range(int(len(signal)/2))]
tpCount     = len(signal)
values      = np.arange(int(tpCount/2))
timePeriod  = tpCount/samplingFrequency
frequencies = values/timePeriod
plt.plot(frequencies, abs(fourierTransform))

Source: pythontic.com

Similar codes

1 vote163 views1 answer
Adding new column to existing DataFrame in Pandas by assigning a list
Python
0 vote230 views3 answers
Matlab to python
Python
0 vote184 views1 answer
Pyserial example code
Python
61 votes264 views6 answers
Python pause
Python
0 vote198 views1 answer
How can space be bent
Python
15 votes205 views3 answers
NAN values count python
Python
94 votes189 views6 answers
For in python
Python
15 votes195 views2 answers
Find faculty of a number python
Python
0 vote187 views1 answer
Loading in pyqt5
Python
1 vote190 views2 answers
Pygame left click
Python