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. 2021 May 11;21(10):3338. doi: 10.3390/s21103338

Table 13.

August 2020 test results, CO, NO2, PM10.

Pollutant (Calibration Set) R2 RMSE
CO, LR (raw) 0.764 0.074
CO, RF (2019) 0.787 0.054
CO, RF (2019 + 2020) 0.801 0.035
NO2, LR (raw) 0.476 24.134
NO2, RF (2019) 0.440 17.834
NO2, RF (2019 + 2020) 0.477 7.917
PM10, LR (raw) 0.408 17.935
PM10, RF (2019) 0.303 8.872
PM10, RF (2019 + 2020) 0.249 8.201