Table 4.

Mean of the Pearson and Spearman correlation over all pairs of feature scores in the 10-outer training sets obtained with different filter methods for feature selection for prediction of residual feed intake.

Filter method1	Pearson	Spearman
mrmr	0.875	0.893
cforest	0.025	0.015
spearcor	0.863	0.802
univ.dtree	0.062	0.059
random	0.001	0.001

¹Filter method = Maximum relevance minimum redundancy (mrmr); Random forest (cforest); Spearman’s correlation (spearcor); Univariate decision tree (univ.dtree); Random selection (random).