 
Experimental groups by phenotypes


 
P1

P2

P3

Marginal sum

Experimental group by rank (or ME^{a}) of gene expression

E1

n_{11}

n_{12}

n_{13}

r_{1}


E2

n_{21}

n_{22}

n_{23}

r_{2}


E3

n_{31}

n_{32}

n_{33}

r_{3}

Marginal sum

c_{1}

c_{2}

c_{3}

n

 The significant genes can be selected by independency test between the phenotypes and gene expressions using this type of summarized data set. c_{
i
},r_{
i
}represent the marginal sums of the i^{th}column and row, respectively. n represents total number of experiments. ^{a}: minimal entropy method