datastream, year, month, tod,n, min, max, mean, std
sgpcmbeC1.c1,2002,05 0:30:00,30 ,       0,       0,       0,       0
sgpcmbeC1.c1,2002,05 1:30:00,30 ,       0,       0,       0,       0
sgpcmbeC1.c1,2002,05 2:30:00,30 ,       0,       0,       0,       0
sgpcmbeC1.c1,2002,05 3:30:00,30 ,       0,       0,       0,       0
sgpcmbeC1.c1,2002,05 4:30:00,30 ,       0,       0,       0,       0
sgpcmbeC1.c1,2002,05 5:30:00,30 ,0.189422,27.99265,12.36507,8.370164
sgpcmbeC1.c1,2002,05 6:30:00,31 ,   9.617,183.0246,99.36808,48.29035
sgpcmbeC1.c1,2002,05 7:30:00,31 ,24.99151,383.6548,254.1195,109.3336
sgpcmbeC1.c1,2002,05 8:30:00,31 ,50.86192,598.7609,382.4121, 174.069
sgpcmbeC1.c1,2002,05 9:30:00,31 ,70.86069,779.2571,532.2983,210.3413
sgpcmbeC1.c1,2002,0510:30:00,31 ,139.6221,920.5377,630.4913,259.6289
sgpcmbeC1.c1,2002,0511:30:00,31 ,88.55654,1009.216,678.6024,329.7338
sgpcmbeC1.c1,2002,0512:30:00,31 ,93.30823,1035.168,645.4345,355.1918
sgpcmbeC1.c1,2002,0513:30:00,31 ,15.82411,1000.861,608.4452,  365.55
sgpcmbeC1.c1,2002,0514:30:00,31 ,19.91676,907.6013, 621.831,294.9465
sgpcmbeC1.c1,2002,0515:30:00,31 ,18.73951,756.4632,517.2654,247.5763
sgpcmbeC1.c1,2002,0516:30:00,31 , 55.6508,581.9634,394.9018,174.8751
sgpcmbeC1.c1,2002,0517:30:00,31 ,8.535593,371.8695,262.5099,110.6499
sgpcmbeC1.c1,2002,0518:30:00,31 ,1.772187,166.7635,93.89189,45.90394
sgpcmbeC1.c1,2002,0519:30:00,31 ,       0,22.16531,7.895096,5.781251
sgpcmbeC1.c1,2002,0520:30:00,31 ,       0,       0,       0,       0
sgpcmbeC1.c1,2002,0521:30:00,31 ,       0,       0,       0,       0
sgpcmbeC1.c1,2002,0522:30:00,30 ,       0,       0,       0,       0
sgpcmbeC1.c1,2002,0523:30:00,30 ,       0,       0,       0,       0