datastream, year, month, tod,n, min, max, mean, std
sgpcmbeC1.c1,1999,02 0:30:00,26 ,       0,1.433831,0.065138,0.283763
sgpcmbeC1.c1,1999,02 1:30:00,25 ,       0,0.389253, 0.01557,0.077851
sgpcmbeC1.c1,1999,02 2:30:00,23 ,       0,       0,       0,       0
sgpcmbeC1.c1,1999,02 3:30:00,25 ,       0,       0,       0,       0
sgpcmbeC1.c1,1999,02 4:30:00,26 ,       0,0.610335,0.023474,0.119697
sgpcmbeC1.c1,1999,02 5:30:00,26 ,       0,1.082429,0.057607,0.224312
sgpcmbeC1.c1,1999,02 6:30:00,26 ,       0,0.458803,0.017646,0.089979
sgpcmbeC1.c1,1999,02 7:30:00,26 , 3.73323,21.46333,10.41018,4.781308
sgpcmbeC1.c1,1999,02 8:30:00,26 ,4.339305, 35.9706, 12.8449,8.944223
sgpcmbeC1.c1,1999,02 9:30:00,26 ,2.472298,43.48246,15.33832,13.40214
sgpcmbeC1.c1,1999,0210:30:00,26 ,1.311404,74.71004,22.62039,22.96946
sgpcmbeC1.c1,1999,0211:30:00,26 ,0.813587,90.66795,30.50144,33.08243
sgpcmbeC1.c1,1999,0212:30:00,26 , 0.59902,133.8394,30.56155,35.25498
sgpcmbeC1.c1,1999,0213:30:00,26 ,0.617853,95.63826,25.75565,24.61416
sgpcmbeC1.c1,1999,0214:30:00,26 ,0.939666,66.01422,23.27022,22.26884
sgpcmbeC1.c1,1999,0215:30:00,26 ,1.180692,50.06081,19.37288,17.13236
sgpcmbeC1.c1,1999,0216:30:00,26 ,3.880306,53.94367,17.77497,14.81955
sgpcmbeC1.c1,1999,0217:30:00,26 ,4.379638,34.46025,15.80153,7.429565
sgpcmbeC1.c1,1999,0218:30:00,26 ,       0,11.27832,3.885825,3.174234
sgpcmbeC1.c1,1999,0219:30:00,26 ,       0,       0,       0,       0
sgpcmbeC1.c1,1999,0220:30:00,26 ,       0,       0,       0,       0
sgpcmbeC1.c1,1999,0221:30:00,26 ,       0,0.435559,0.040652,0.117013
sgpcmbeC1.c1,1999,0222:30:00,26 ,       0,  0.8668,0.047889,0.182738
sgpcmbeC1.c1,1999,0223:30:00,26 ,       0,       0,       0,       0