WelchWin: Welch (parabolic) window function

The function returns a parabolic window of length n. This is useful for spectral estimation.

WELCHWIN Welch (parabolic) window

Usage:
w = welchwin(n) returns the n-point parabolic window

n: scalar window length

w: column vector of window values

Example:
t = (0:9)';
s = rand(1,10)';
n = length(s);
w = welchwin(n);
s2 = s.*w;
plot(t, s, 'ko', t, s2, 'r-')
legend('original data', 'windowed data')

See also: RECTWIN