Function get_idf

src/models/sparse_ann_query.rs:383–387

(documents_count: u32, documents_containing_term: u32)

}

fn get_idf(documents_count: u32, documents_containing_term: u32) -> f32 {
    (((documents_count - documents_containing_term) as f32 + 0.5)
        / (documents_containing_term as f32 + 0.5))
        .ln_1p()
}