Fig. 9
From: Agrimonia: a dataset on livestock, meteorology and air quality in the Lombardy region, Italy

Bi-hourly PM2.5 data. Impact of Kalman smoother on daily data for the monitoring station named ‘Parona Via della Miseria’. Daily time series obtained with our method (blue line) with highlighted imputed days (blue crosses) and daily mean (orange diamonds) computed without considering missing values, RMSE = 0.3078.