21.5.9  Hann window

The hann_window command applies the Hann window function to a sequence or its segment.

• hann_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).
• hann_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=sin2

  ⎛ ⎜ ⎜ ⎝

  k π N−1

  ⎞ ⎟ ⎟ ⎠

  ,    k=0,1,…,N−1.

Example