21.5.7  Hamming window

The hamming_window command applies the Hamming window function to a sequence or its segment.

• hamming_window takes one mandatory argument and two optional arguments:
  • v, a real vector with length n.
  • Optionally, m, N, a sequence of two integers (by default, m=0 and N=n).
• hamming_window returns the elementwise product of [v_m,v_m+1,…,v_m+N−1] and the vector w of length N defined by

  wk=α−β cos

  ⎛ ⎜ ⎜ ⎝

  2 k π N−1

  ⎞ ⎟ ⎟ ⎠

  for k=0,1,…,N−1, where α=0.54 and β=1−α=0.46.

Example