Inverse document frequency

The inverse document frequency is a measure of how much information a term provides, that is, whether the term is common or rare across all documents.

Property definitions

vsm $ VSMIndex :: inverse_doc_frequency
	# Inverse document frequency
	#
	# The inverse document frequency is a measure of how much information a term
	# provides, that is, whether the term is common or rare across all documents.
	var inverse_doc_frequency = new Vector
lib/vsm/vsm.nit:144,2--148,39