datastream, year, month, tod,n, min, max, mean, std
sgpcmbeC1.c1,2007,02 0:30:00,20 ,       0,       0,       0,       0
sgpcmbeC1.c1,2007,02 1:30:00,19 ,       0,       0,       0,       0
sgpcmbeC1.c1,2007,02 2:30:00,18 ,       0,       0,       0,       0
sgpcmbeC1.c1,2007,02 3:30:00,19 ,       0,       0,       0,       0
sgpcmbeC1.c1,2007,02 4:30:00,18 ,       0,       0,       0,       0
sgpcmbeC1.c1,2007,02 5:30:00,20 ,       0,       0,       0,       0
sgpcmbeC1.c1,2007,02 6:30:00,26 ,       0,0.106442,0.004094,0.020875
sgpcmbeC1.c1,2007,02 7:30:00,28 ,0.095181,15.32062,5.481734,4.478463
sgpcmbeC1.c1,2007,02 8:30:00,28 ,1.790712,54.63062,32.57868,18.14809
sgpcmbeC1.c1,2007,02 9:30:00,28 ,2.063516,150.3224, 64.4277,33.44447
sgpcmbeC1.c1,2007,0210:30:00,28 ,2.686048, 200.189,86.36103,43.86623
sgpcmbeC1.c1,2007,0211:30:00,28 ,13.07711, 180.238, 102.563,44.51297
sgpcmbeC1.c1,2007,0212:30:00,28 ,17.87656,148.5807,106.2925,41.86736
sgpcmbeC1.c1,2007,0213:30:00,28 ,9.182981,143.6856,104.2829,39.89483
sgpcmbeC1.c1,2007,0214:30:00,28 ,9.933254,126.7158,87.72475,37.29816
sgpcmbeC1.c1,2007,0215:30:00,28 ,10.52365,102.6494, 66.0051,29.69881
sgpcmbeC1.c1,2007,0216:30:00,28 ,5.162848,68.20957,40.37323,20.78389
sgpcmbeC1.c1,2007,0217:30:00,28 ,0.841004,28.04766,12.87519,8.929577
sgpcmbeC1.c1,2007,0218:30:00,28 ,       0,1.101921,0.165643,0.312158
sgpcmbeC1.c1,2007,0219:30:00,23 ,       0,       0,       0,       0
sgpcmbeC1.c1,2007,0220:30:00,22 ,       0,       0,       0,       0
sgpcmbeC1.c1,2007,0221:30:00,20 ,       0,       0,       0,       0
sgpcmbeC1.c1,2007,0222:30:00,23 ,       0,       0,       0,       0
sgpcmbeC1.c1,2007,0223:30:00,21 ,       0,       0,       0,       0