Figure 1
From: Analysis with respect to instrumental variables for the exploration of microarray data structures
Between/within-group analysis. Schematic representation of BGA and WGA procedures adapted from [11]. For BGA (panel A), the analysis of table Y is initially performed on the per-class sample average table Y+ and every sample is projected on the factorial map (2 first principal axes). For WGA (panel B), samples in Y are scaled by dividing them by the per-class means, and the analysis is performed on the scaled table Y-. The per-class factorial map of WGA (2 first principal axes) is centered around 0.