Version 1.0b1 API Documentation generated by Endo 2006-08-14

Function summary

• fftfreq(n, d = 1.0)
• fftshift(x, axes = None)
• ifftshift(x, axes = None)

Functions

• fftfreq(n, d = 1.0)

  fftfreq(n, d=1.0) -> f

  DFT sample frequencies

  The returned float array contains the frequency bins in cycles/unit (with zero at the start) given a window length n and a sample spacing d:

  f = [0,1,...,n/2-1,-n/2,...,-1]/(d*n) if n is even f = [0,1,...,(n-1)/2,-(n-1)/2,...,-1]/(d*n) if n is odd

• fftshift(x, axes = None)

  fftshift(x, axes=None) -> y

  Shift zero-frequency component to center of spectrum.

  This function swaps half-spaces for all axes listed (defaults to all).

  Notes:

  If len(x) is even then the Nyquist component is y[0].

• ifftshift(x, axes = None)

  ifftshift(x,axes=None) - > y

  Inverse of fftshift.

Imported names