Relationship between Her2+, ER + and TNBC classes of samples visualized by Principal Component Analysis (PCA) on the training set samples using expression of genes differentially expressed between the three classes. A. Training set samples B. Projection of testing set samples on the first and second principal components derived from the training set. White square in dark grey diamond indicates tested sample with double diagnosis Her2+/ER +.
Tchou et al. BMC Medical Genomics 2012 5:39 doi:10.1186/1755-8794-5-39