MOFSRank: A Multiobjective Evolutionary Algorithm for Feature Selection in Learning to Rank

Table 1

Characteristics of the LETOR Data Sets.

Data set	Queries	Features	Rel.levels	Query-document pairs
NP2004	75	64	2	75747
HP2004	75	64	2	80306
TD2004	75	64	2	1079810
MQ2008	784	46	2	80925
OHSUMED	106	45	3	582588