Normalization

This class acts as the base class for the implementations of the term frequency normalization methods in the DFR framework.

Constructors

constructor()

Sole constructor. (For invocation by subclass constructors, typically implicit.)

Implementation used when there is no normalization.

Returns an explanation for the normalized term frequency.

abstract fun tfn(stats: BasicStats, tf: Double, len: Double): Double

Returns the normalized term frequency.

abstract override fun toString(): String

Subclasses must override this method to return the code of the normalization formula. Refer to the original paper for the list.