norm¶

        my $norm = $sim->norm($num_term);

byte_norm¶

        my $byte_norm = $sim->byte_norm($byte);

tf¶

Computes a score factor based on a term or phrase's frequency in a document.

idf¶

Computes a score factor for a phrase.

coord¶

Computes a score factor based on the fraction of all query terms that a document contains.