datastream, year, month, tod,n, min, max, mean, std
sgpcmbeC1.c1,2004,05 0:30:00,30 ,       0,0.048862,0.002081,0.009176
sgpcmbeC1.c1,2004,05 1:30:00,29 ,       0,0.000112,3.862E-6,0.000021
sgpcmbeC1.c1,2004,05 2:30:00,28 ,       0,       0,       0,       0
sgpcmbeC1.c1,2004,05 3:30:00,28 ,       0,       0,       0,       0
sgpcmbeC1.c1,2004,05 4:30:00,28 ,       0,       0,       0,       0
sgpcmbeC1.c1,2004,05 5:30:00,31 ,       0, 10.7686,3.417278,2.913356
sgpcmbeC1.c1,2004,05 6:30:00,31 ,0.093691,58.04235, 31.3187, 16.8378
sgpcmbeC1.c1,2004,05 7:30:00,31 ,3.154836,105.1598, 66.1828,30.73581
sgpcmbeC1.c1,2004,05 8:30:00,31 ,9.299849,139.4615,96.08162,39.36948
sgpcmbeC1.c1,2004,05 9:30:00,31 ,9.549747,162.4027,115.4514,45.19621
sgpcmbeC1.c1,2004,0510:30:00,31 ,9.341985,182.2912,139.5251,41.97688
sgpcmbeC1.c1,2004,0511:30:00,31 ,22.43142,188.9662,155.2587,39.26687
sgpcmbeC1.c1,2004,0512:30:00,31 ,13.44466,191.1378,153.6616,41.79901
sgpcmbeC1.c1,2004,0513:30:00,31 ,2.899635,187.1227,152.4261,42.48029
sgpcmbeC1.c1,2004,0514:30:00,31 ,2.352009,179.2827,141.5968,42.81654
sgpcmbeC1.c1,2004,0515:30:00,31 ,2.257064,163.4767,121.3454,43.03947
sgpcmbeC1.c1,2004,0516:30:00,31 ,6.681523, 137.338,99.24782,32.44481
sgpcmbeC1.c1,2004,0517:30:00,31 ,3.223967,97.54139,69.31339,22.87631
sgpcmbeC1.c1,2004,0518:30:00,31 ,3.064077,51.47174,29.65534, 11.1539
sgpcmbeC1.c1,2004,0519:30:00,31 ,0.066891,7.644291,2.378472,1.866562
sgpcmbeC1.c1,2004,0520:30:00,31 ,       0,       0,       0,       0
sgpcmbeC1.c1,2004,0521:30:00,31 ,       0,       0,       0,       0
sgpcmbeC1.c1,2004,0522:30:00,30 ,       0,0.111996,0.007303,  0.0278
sgpcmbeC1.c1,2004,0523:30:00,31 ,       0,0.013043,0.000432,0.002341