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

Table 5

The training instances of MOFSRank and MOFSRank-NonIS on LETOR data sets.

	NP2004	HP2004	TD2004	MQ2008	OHSUMED
#Ins of MOFSRank-NonIS	45445	48183	647886	48555	349552
#Ins of MOFSRank	14493	8563	20407	2611	10399
Instances ratio	0.32	0.19	0.04	0.06	0.03