The colon data contains two objects: colon.x, microarray
expression data for 62 colon cancer samples and colon.y, the class
labels for these samples.
data(colon)An expression data matrix (62x2000) colon.x and a class label
vector (62) colon.y for 62 samples.
colon.y is the class labels of the 62 samples. colon.x is
the microarray expression data matrix with each row representing a sample.
Y. Guo, T. Hastie, R. Tibshirani, (2006). Regularized linear discriminant analysis and its application in microarrays, Biostatistics 8 pp. 86--100. tools:::Rd_expr_doi("10.1093/biostatistics/kxj035").