Previous Up Next

5.23.9  Blackman window function : blackman_window

blackman_window takes as arguments a real vector v of length n and optionally a real number α (by default α=0.16 ) and/or 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=n2n1+1 defined by

wk=
1−α
2
1
2
 cos


k π
N−1



+
α
2
 cos


k π
N−1



for k=0,1,…,N−1 . For example, input :

L:=blackman_window(randvector(1000,0..1)):;

followed by scatterplot(L).


Previous Up Next