Informative Gene Selection and Direct Classification of Tumor Based on Chi-Square Test of Pairwise Gene Interactions

Table 2

Frequency counts of samples in each class for single genes.

Class	𝑥𝑖𝑗>𝑥•𝑗	𝑥𝑖𝑗<𝑥•𝑗	Total
𝐶1	𝑆𝑓11	𝑆𝑓12	𝑆𝑛1=𝑆𝑓11+𝑆𝑓12
⋮	⋮	⋮	⋮
𝐶𝑚	𝑆𝑓𝑚1	𝑆𝑓𝑚2	𝑆𝑛𝑚=𝑆𝑓𝑚1+𝑆𝑓𝑚2
Total	𝑆𝑇1=∑^𝑚𝑘=1𝑆𝑓𝑘1	𝑆𝑇2=∑^𝑚𝑘=1𝑆𝑓𝑘2	𝑆𝑁=∑^𝑚𝑘=1𝑆𝑛𝑘