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. Author manuscript; available in PMC: 2017 Apr 1.
Published in final edited form as: Stat Sin. 2016 Oct;26(4):1747–1770. doi: 10.5705/ss.202015.0088

Figure 1.

Figure 1

PCA of RNAseq log read depth maps, for the union of exons in the gene CDKN2A. Left panel shows data curves. Right panel is the PC1 vs. Pc2 scores scatter-plot, showing three distinct clusters (brushed with gray levels). Use of these same colors in the left panel shows essentially unexpressed cases (lightest grey), and a clear alternate splicing event (other grey shades). This is an HDLSS example where PCA clearly reveals important biological structure.