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Table 4 Combination of contingency tables for three data sets (t ij = a ij + b ij + c ij )

From: Improving the prediction accuracy in classification using the combined data sets by ranks of gene expressions

 

P1

P2

P3

  

P1

P2

P3

  

P1

P2

P3

  

P1

P2

P3

E1

a11

a12

a13

 

E1

b11

b12

b13

 

E1

c11

c12

c13

 

E1

t11

t12

t13

E2

a21

a22

a23

+

E2

b21

b22

b23

+

E2

c21

c22

c23

=

E2

t21

t22

t23

E3

a31

a32

a33

 

E3

b31

b32

b33

 

E3

c31

c32

c33

 

E3

t31

t32

t33

data set A

 

data set B

 

data set C

 

combined data set

  1. P1, P2 and P3 represent the three different phenotypes. E1, E2 and E3 represent three groups by ranks of gene expressions. aij, bij and cij are the numbers of experiments belong to Pj and Ei at the same time in data A, data B and data C, respectively.