1. plsgenomics::Colon
    Gene expression data from Alon et al. (1999)
  2. plsgenomics::Ecoli
    Ecoli gene expression and connectivity data from Kao et al. (2003)
  3. plsgenomics::SRBCT
    Gene expression data from Khan et al. (2001)
  4. plsgenomics::leukemia
    Gene expression data from Golub et al. (1999)