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. Author manuscript; available in PMC: 2018 Mar 15.
Published in final edited form as: Chemometr Intell Lab Syst. 2016 Dec 23;162:10–20. doi: 10.1016/j.chemolab.2016.12.010

Figure 4.

Figure 4

PCA loadings (P) shaded by explained variance fractions for the Z matrices (Zi,k values). Black represents more explained variance, so the black bar is the first principal component. Plots are annotated with the explained variance fractions for the first L principal components. Note that, because this PCA is conducted on the Zi,k values, each loading vector will appear as a laboratory performance vector similar to that in Fig. 3.