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5.23.12  Gaussian window function : gaussian_window

gaussian_window takes as arguments a real vector v of length n and optionally a positive real number α≤ 0.5 (by default α=0.1 ) 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=exp





1
2
 


k−(N−1)/2
α (N−1)/2



2



 






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

L:=gaussian_window(randvector(1000,0..1),0.4):;

followed by scatterplot(L).


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