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hann
Window Hann function

Description
Y = hann(N) returns a N-point hann function (usually N is a power of 
2), ie a discretization of Y(X) = (1 - COS (2*PI*X))/2. 
 
The hann function is used to window (apodize) finite samples of signal 
in order to avoid high frequency oscillations in Fourier transform. 
 
Example:  plot(hann(128)); 
 
F. Moisy 
Revision: 1.02,  Date: 2005/09/03 
 
See Also
FFT. 

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