A dataset containing The Cancer Genome Atlas expression
data. From this publication https://tcga-data.nci.nih.gov/docs/publications/lgggbm_2016/.
The first data frame is a 5133X150 RNA-seq data matrix, the second is a 262X150
miRNA-seq data matrix, the third is 45X150 protein array data matrix. The data was
all pre-normalised then subject to log transform.