Fourier Analysis
Fast Fourier Transform, inverse transforms, frequency utilities, and window functions for spectral analysis.
fft
Fast Fourier Transform
Y = fft(X)
ifft
Inverse Fast Fourier Transform
x = ifft(Y)
fft2
2-D Fast Fourier Transform
Y = fft2(X)
ifft2
2-D inverse FFT
x = ifft2(Y)
fftn
N-dimensional FFT
Y = fftn(X)
ifftn
N-dimensional inverse FFT
x = ifftn(Y)
fftshift
Shift zero-frequency component to center
Y = fftshift(X)
ifftshift
Inverse of fftshift
Y = ifftshift(X)
fftfreq
DFT sample frequencies
f = fftfreq(n)
bartlett
Bartlett (triangular) window
w = bartlett(M)
blackman
Blackman window
w = blackman(M)
hamming
Hamming window
w = hamming(M)
hanning
Hanning (Hann) window
w = hanning(M)
kaiser
Kaiser window
w = kaiser(M, beta)