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Outcomes of RC and IF algorithms (blue color: normal samples, red color: abnormal samples) for PM10, temperature and relative humidity values collected by the bpost Car 2. (a) RC with 1.0% (3D perspective), bpost Car 2; (b) RC with 1.0% (3D planes), bpost Car 2; (c) IF with 1.0% (3D perspective), bpost Car 2; (d) IF with 1.0% (3D planes), bpost Car 2.
