datastream, year, month, tod,n, min, max, mean, std
sgpcmbeC1.c1,2004,02 0:30:00,26 ,       0,0.005911,0.000318,0.001231
sgpcmbeC1.c1,2004,02 1:30:00,25 ,       0, 0.00045,0.000018, 0.00009
sgpcmbeC1.c1,2004,02 2:30:00,26 ,       0,       0,       0,       0
sgpcmbeC1.c1,2004,02 3:30:00,27 ,       0,       0,       0,       0
sgpcmbeC1.c1,2004,02 4:30:00,25 ,       0,       0,       0,       0
sgpcmbeC1.c1,2004,02 5:30:00,28 ,       0,       0,       0,       0
sgpcmbeC1.c1,2004,02 6:30:00,29 ,       0,0.012477, 0.00043,0.002317
sgpcmbeC1.c1,2004,02 7:30:00,29 ,       0, 15.2497,5.445116,4.237242
sgpcmbeC1.c1,2004,02 8:30:00,29 ,1.031423, 107.134,39.18273,28.87878
sgpcmbeC1.c1,2004,02 9:30:00,29 ,2.903936, 234.622, 79.1633,63.30854
sgpcmbeC1.c1,2004,0210:30:00,29 , 5.92009,336.9159,123.3801,93.20769
sgpcmbeC1.c1,2004,0211:30:00,29 ,7.830295,403.9003,149.6229,113.6662
sgpcmbeC1.c1,2004,0212:30:00,29 ,8.192764,428.5314,158.1716,112.0357
sgpcmbeC1.c1,2004,0213:30:00,29 ,6.733891,410.7986,159.2474,99.24885
sgpcmbeC1.c1,2004,0214:30:00,29 ,3.479625,356.6493, 130.729,78.28715
sgpcmbeC1.c1,2004,0215:30:00,29 ,1.466183,269.3227,98.99382,56.60223
sgpcmbeC1.c1,2004,0216:30:00,29 ,0.039924,155.2835, 60.6034,33.16826
sgpcmbeC1.c1,2004,0217:30:00,29 ,       0,40.17959,19.04658,10.08003
sgpcmbeC1.c1,2004,0218:30:00,29 ,       0,2.087557,0.231854,0.450999
sgpcmbeC1.c1,2004,0219:30:00,29 ,       0,       0,       0,       0
sgpcmbeC1.c1,2004,0220:30:00,29 ,       0,       0,       0,       0
sgpcmbeC1.c1,2004,0221:30:00,28 ,       0,       0,       0,       0
sgpcmbeC1.c1,2004,0222:30:00,27 ,       0,0.006749, 0.00025,0.001299
sgpcmbeC1.c1,2004,0223:30:00,27 ,       0,       0,       0,       0