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. Author manuscript; available in PMC: 2010 Jun 18.
Published in final edited form as: Ann Appl Stat. 2009 Jan 1;3(3):922–942. doi: 10.1214/09-AOAS236

Figure 2.

Figure 2

Left panel: Components of first eigenvector of row sample correlation matrix for the 44 healthy Cardio subjects, plotted versus array number 1, 2, … , 44; dashes emphasize the block of large components for arrays 27–32. Right panel: First eigenvectors for healthy (solid line) and cancer (dashed) subjects, prostate cancer study, Singh, Febbo, et al. (2002); there was a systematic drift in expression levels as the study progressed.