The filter coefficients w(i) of a Hanning
window of length
n are computed according to the formula
w(i) = 0.5 - 0.5*cos(2*pi*i/(n-1))
The length of the window.
A vector containing the filter coefficients.
For a definition of the Hanning window, see for example
Alan V. Oppenheim and Roland W. Schafer: "Discrete-Time Signal Processing", Prentice-Hall, 1989.
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