datastream, year, month, tod,n, min, max, mean, std
sgpcmbeC1.c1,2002,02 0:30:00,11 ,       0,0.457169,0.041561,0.137842
sgpcmbeC1.c1,2002,02 1:30:00,12 ,       0,       0,       0,       0
sgpcmbeC1.c1,2002,02 2:30:00,12 ,       0,       0,       0,       0
sgpcmbeC1.c1,2002,02 3:30:00,11 ,       0,       0,       0,       0
sgpcmbeC1.c1,2002,02 4:30:00,13 ,       0,       0,       0,       0
sgpcmbeC1.c1,2002,02 5:30:00,16 ,       0,       0,       0,       0
sgpcmbeC1.c1,2002,02 6:30:00,18 ,       0,       0,       0,       0
sgpcmbeC1.c1,2002,02 7:30:00,18 ,8.440495,54.84976,29.92783,13.76055
sgpcmbeC1.c1,2002,02 8:30:00,18 ,14.92529,82.60436,57.43932, 17.7722
sgpcmbeC1.c1,2002,02 9:30:00,18 ,20.76103,139.9703,60.94456,29.36859
sgpcmbeC1.c1,2002,0210:30:00,18 ,39.32053, 160.114,71.44261,35.55459
sgpcmbeC1.c1,2002,0211:30:00,18 ,22.69728,166.4641,70.17638,51.40204
sgpcmbeC1.c1,2002,0212:30:00,18 ,3.686677,205.9503,61.64527,60.61835
sgpcmbeC1.c1,2002,0213:30:00,18 ,14.95527,159.0022,54.45981,45.71134
sgpcmbeC1.c1,2002,0214:30:00,18 ,23.52642,184.8886,61.22946,43.68483
sgpcmbeC1.c1,2002,0215:30:00,18 ,46.96212,148.5642,80.23559, 36.7529
sgpcmbeC1.c1,2002,0216:30:00,19 ,26.02668,114.0173,62.82313,19.43266
sgpcmbeC1.c1,2002,0217:30:00,19 , 10.9783, 67.9017,46.84245, 14.7327
sgpcmbeC1.c1,2002,0218:30:00,19 ,       0,12.19827,5.638183,3.727444
sgpcmbeC1.c1,2002,0219:30:00,19 ,       0,       0,       0,       0
sgpcmbeC1.c1,2002,0220:30:00,19 ,       0,       0,       0,       0
sgpcmbeC1.c1,2002,0221:30:00,17 ,       0,       0,       0,       0
sgpcmbeC1.c1,2002,0222:30:00,16 ,       0,       0,       0,       0
sgpcmbeC1.c1,2002,0223:30:00,16 ,       0,0.457624,0.028601,0.114406