Raman Spectroscopy in Colorectal Cancer Diagnostics: Comparison of PCA-LDA and PLS-DA Models

Figure 4

Box charts of the two PCA component (PC) scores and three significant PLS component (LV) scores calculated from the Raman dataset for normal and cancerous tissue types: (a) PC1 score, (b) PC2 score, (c) LV1 score, (d) LV2 score, and (e) LV3 score. The line within each box represents the median, while the lower and upper boundaries of the box indicate the first (25th percentile) and the third (75th percentile) quartiles, respectively. Error bars (whiskers) represent the 1.5-fold interquartile range.

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