Fig. 4
From: Serum proton NMR metabolomics analysis of human lung cancer following microwave ablation
S-plot from PLS-DA analysis to visualize the variable influences and to filter potential metabolites. Warm color (red) denotes a large contribution to grouping and cold color (blue) denotes less contribution to grouping. The significantly increased metabolites in NSCLC group were located in the upper-right quadrant and the decreased metabolites were located in the lower-left quadrant