 
 
 
hann_window takes as arguments a real vector v of length n and optionally an interval n1 .. n2 (with default values n1=0 and n2=n−1 ), and returns the elementwise product of the vector [vn1,…,vn2] and the vector w of length N=n2−n1+1 defined by
| wk=sin2 | ⎛ ⎜ ⎜ ⎝ | 
 | ⎞ ⎟ ⎟ ⎠ | 
for k=0,1,…,N−1 . For example, input :
followed by scatterplot(L).
 
 
