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

0 vote153 views2 answers
Django rest framework foreign key relation giving error in serializer
Python Django
0 vote128 views1 answer
How to import something in python
Python
0 vote119 views1 answer
Bytestring python
Python
1 vote119 views1 answer
Install quick-mailer
Python
0 vote146 views1 answer
Convert float to booelan
Python
2 votes125 views1 answer
How to change the color of the cursor in tkinter
Python
2 votes126 views1 answer
Python - prime number generator
Python
17 votes139 views6 answers
Python matplotlib
Python
0 vote149 views1 answer
Select inverse with conditions pandas
Python
0 vote163 views1 answer
"DO_NOTHING" is not defined django
Python Django