Enum Taper 

pub enum Taper {
    Rectangular,
    Hamming,
    Hann,
    Blackman,
}

A window function applied to samples before the forward transform.

Every taper trades main-lobe width against sidelobe height. A rectangular taper is no taper at all: it keeps amplitude exact for a tone that lands on a bin and leaks badly for one that does not.

The forward transform divides by this taper’s coherent gain, so a tone’s recovered amplitude is the tone’s amplitude whichever taper measured it.

Variants

Rectangular

No shaping: exact on-bin amplitude, worst leakage off it.

Hamming

Hamming — a lower first sidelobe than Hann at a higher noise floor.

Hann

Hann, once spelled Hanning — the general-purpose choice, zero at both ends.

Blackman

Blackman — the lowest sidelobes here, and the widest main lobe.

Implementations

impl Taper

pub fn coefficient(&self, index: usize, length: usize) -> f64

This taper’s coefficient for sample index of a length-sample segment.

pub fn coefficients(&self, length: usize) -> Vec<f64>

The coefficients of a whole length-sample segment.

Trait Implementations

impl Clone for Taper

fn clone(&self) -> Taper

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Copy for Taper

impl Debug for Taper

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Eq for Taper

impl PartialEq for Taper

fn eq(&self, other: &Taper) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl StructuralPartialEq for Taper