pub fn exponential(
m: usize,
center: Option<f64>,
tau: f64,
) -> FerrayResult<Array<f64, Ix1>>Expand description
Exponentially decaying window centred on center with time-constant tau.
w(n) = exp(-|n - center| / tau). If center is None, defaults to
the geometric centre (M - 1) / 2. tau must be > 0.
Mirrors scipy.signal.windows.exponential /
torch.signal.windows.exponential.