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(A) PC loadings of the three statistically significant PCs (PC1, PC2 and PC4) calculated from PCA. (B) A 3D scatter plot of the PCA result calculated from the SERS data for the leukemia cells groups (HL60 + K562) and the normal cell group (BMC) with PC1, PC2, and PC4 as three axes. (C) Scatter plots of the posterior probability for the leukemia cells and the normal cells categories using the PCA-LDA algorithm.
