triangle_window takes as arguments a real vector v of length n and optionally an integer d∈{−1,0,1} (by default d=0 ) 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=n2−n1+1 defined by
wk=1− | ⎪ ⎪ ⎪ ⎪ ⎪ ⎪ ⎪ |
| ⎪ ⎪ ⎪ ⎪ ⎪ ⎪ ⎪ |
for k=0,1,…,N−1 (the case d=−1 is called the Bartlett window function). For example, input :
followed by scatterplot(L).