Fig. 1: Evaluation results of the models. | npj Climate and Atmospheric Science

Fig. 1: Evaluation results of the models.

From: Deriving PM2.5 from satellite observations with spatiotemporally weighted tree-based algorithms: enhancing modeling accuracy and interpretability

Fig. 1

The dotted line is the 1:1 line, and N is the number of samples. “Val” and “Test” represent model validation and test, respectively. Each subplot is labeled with a combination of letters and numbers, where a, b, and c respectively refer to RF/GTW-RF, LGBM/GTW-LGBM, XGBoost/GTW-XGBoost, and the numbers 1–4 refer to the validation and test results of the global models and local models, respectively. The equations stand for the regression relationships between the estimated and observed PM2.5.

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