Fig. 3: Variable selection based on the total absolute principal component coefficients by operating on EEM data from four types of DOM. | npj Clean Water

Fig. 3: Variable selection based on the total absolute principal component coefficients by operating on EEM data from four types of DOM.

From: A novel-approach for identifying sources of fluvial DOM using fluorescence spectroscopy and machine learning model

Fig. 3

a MS-DOM, b DW-DOM, c LW-DOM, and d NO-DOM. The red circles represented the locations (Ex/Em) of key peaks from the total absolute principal component coefficients, and the length of the red line segments indicated the ranges of the key peaks in the Em direction.

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