Struct TopicCoherenceScorer 

pub struct TopicCoherenceScorer { /* private fields */ }

Topic coherence calculator.

Supports C_v (NPMI-based) and UMass coherence metrics.

Implementations

impl TopicCoherenceScorer

pub fn new() -> Self

Create a new coherence scorer.

pub fn with_window_size(self, size: usize) -> Self

Set window size.

pub fn cv_coherence( &self, topic_words: &[Vec<String>], documents: &[Vec<String>], ) -> Result<f64>

Calculate C_v coherence (NPMI-based, Roder et al. 2015).

Higher values indicate more coherent topics.

pub fn umass_coherence( &self, topic_words: &[Vec<String>], documents: &[Vec<String>], ) -> Result<f64>

Calculate UMass coherence (Mimno et al. 2011).

Uses document co-occurrence. Higher (less negative) values are better.

Trait Implementations

impl Clone for TopicCoherenceScorer

fn clone(&self) -> TopicCoherenceScorer

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for TopicCoherenceScorer

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

Formats the value using the given formatter.

impl Default for TopicCoherenceScorer

fn default() -> Self

Returns the “default value” for a type.