Table 1.

Example of the breast cancer RNA-seq data matrix extracted from The Cancer Genome Atlas (TCGA)

SampleID	ANO8	C1orf27	TRPM6	$\cdots$	Class
A8-A09D	2.64	5.42	0.38	$\cdots$	Breast cancer
BH-A0DH	1.46	6.47	0.76	$\cdots$	Normal
GM-A2DC	2.22	22.50	0.53	$\cdots$	Breast cancer
GM-A2D9	3.13	14.21	0.61	$\cdots$	Breast cancer
$\cdots$	⋯	⋯	⋯	$\cdots$	$\cdots$
GM-A2DB	3.86	5.15	0.59	$\cdots$	Breast cancer

The rows correspond to the samples and the columns to their features (gene expression profiles). The cells contain the gene expression measure Reads Per Kilobase per Million mapped reads (RPKM) explained in Section 2.3.