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. 2021 Feb 4;22(4):1554. doi: 10.3390/ijms22041554

Figure 5.

Figure 5

Correlation heatmap with hierarchical clustering between GC-MS data and ATR-FTIR data. Yellow: Negative correlation; Red: Positive correlation; Clustering distance: Euclidean; Method: Ward methodology; Rows: FTIR variables; Columns: GC variables.