Struct Extractor 

pub struct Extractor { /* private fields */ }

One way of reading a feature out of a piece: music21’s FeatureExtractor, with what its class says about the feature.

Implementations

impl Extractor

pub fn id(&self) -> &'static str

The extractor’s id.

pub fn name(&self) -> &'static str

What the feature is called.

pub fn description(&self) -> &'static str

What the feature measures.

pub fn dimensions(&self) -> usize

How many values the feature has.

pub fn discrete(&self) -> bool

Whether the values are counts rather than measurements.

pub fn normalize(&self) -> bool

Whether the values are scaled to sum to one.

pub fn attribute_labels(&self) -> Vec<String>

The labels of the values in a data set: the name with underscores for spaces, numbered where there is more than one value.

pub fn blank(&self) -> Feature

The feature as it stands before anything is read: every value a whole nought. music21’s getBlankFeature, which a data set stands in for a feature that cannot be read.

pub fn extract(&self, data: &DataInstance) -> Result<Feature>

The feature of a prepared piece: music21’s extract.

Errors

A piece the feature cannot be read from – one with no notes, for most of them – or a normalized feature whose values are all nought.

Trait Implementations

impl Clone for Extractor

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for Extractor

impl Debug for Extractor

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

Formats the value using the given formatter.