numpy Fourier transform

Fourier transform

Fourier series for a periodic function is expanded in the time domain

Fourier series Fourier transform is visualized in the frequency domain

Key_Function

Code

Import numpy AS NP
 Import matplotlib.pyplot AS PLT 

X = np.linspace (0, 2 * np.pi, 30 ) 
Wave = np.cos (X) 

transformed = np.fft.fft (Wave)   # cosine wave signal applied fft function 

# IFFT is the inverse fft function 
Print (np.all (np.abs (np.fft.ifft (transformed) - Wave) <10 ** -9 ))
 # True 

plt.plot (transformed) 
plt.show ()