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Table 2 Bias due to the order of gene expression values.

From: A novel method for finding non-small cell lung cancer diagnosis biomarkers

Class/Range C 1 C 2 C 3 Class/Range C 1 C 2 C 3
R 1 3 0 0 R 1 3 0 0
R 2 0 88 0 R 2 4 0 0
R 3 4 0 0 R 3 0 88 0
R 4 0 0 5 R 4 0 0 5
  1. In this example, we consider the goodness ranking of two genes in a dataset with 100 patients and 3 classes of cancer sub-types. The expression values of the genes were discretized into 4 ranges R1, R2, R3 and R4. There are 4 patients in class C1 with expression values of gene #1 in the range R3, 88 patients in class C2 with expression values of gene #1 in the range R2, and so on.