Performance comparison of the LHR with 12 standard feature selection schemes (FSSs). Nine benchmarked microarray datasets (a-i), whose name was positioned in middle below of the x-axis, were used to test the performance of the FSSs. For each tested data, the results after five classification, coupling with 13 FSSs through LOOCV are box plotted. The proposed LHR outperformed or archived comparable performance to other methods. Moreover, the results after LHR show small variation on LOOCV error when tested with different classifiers, implying a high degree of robustness.