datastream, year, month, tod,n, min, max, mean, std
sgpcmbeC1.c1,2007,04 0:30:00,24 ,       0,       0,       0,       0
sgpcmbeC1.c1,2007,04 1:30:00,22 ,       0,       0,       0,       0
sgpcmbeC1.c1,2007,04 2:30:00,24 ,       0,       0,       0,       0
sgpcmbeC1.c1,2007,04 3:30:00,23 ,       0,       0,       0,       0
sgpcmbeC1.c1,2007,04 4:30:00,25 ,       0,       0,       0,       0
sgpcmbeC1.c1,2007,04 5:30:00,28 ,       0,4.318048, 0.94265,1.448525
sgpcmbeC1.c1,2007,04 6:30:00,30 ,       0,88.72683,29.38761,19.09801
sgpcmbeC1.c1,2007,04 7:30:00,30 ,1.086107,194.2473,85.20461,43.76641
sgpcmbeC1.c1,2007,04 8:30:00,30 ,16.48691,287.9864, 149.126,76.85457
sgpcmbeC1.c1,2007,04 9:30:00,30 ,6.982819,388.3355,193.1747,118.7487
sgpcmbeC1.c1,2007,0410:30:00,30 , 16.2934, 462.521,225.9631,140.3724
sgpcmbeC1.c1,2007,0411:30:00,30 ,31.30745,532.0648,243.0164,159.6902
sgpcmbeC1.c1,2007,0412:30:00,30 ,17.81594,622.9504,238.3881,166.6831
sgpcmbeC1.c1,2007,0413:30:00,30 ,37.58538,583.5731,241.2527,153.8598
sgpcmbeC1.c1,2007,0414:30:00,30 ,35.72435,452.9034,210.7415,  126.41
sgpcmbeC1.c1,2007,0415:30:00,30 ,19.23065,389.5193,173.2002,108.9237
sgpcmbeC1.c1,2007,0416:30:00,30 ,13.74726,320.5297,132.4387,77.35718
sgpcmbeC1.c1,2007,0417:30:00,30 ,7.148163,178.2234, 81.6933,40.83054
sgpcmbeC1.c1,2007,0418:30:00,30 ,2.570103,81.53001,32.71031,17.61573
sgpcmbeC1.c1,2007,0419:30:00,28 ,       0,4.928888,0.740492,1.121042
sgpcmbeC1.c1,2007,0420:30:00,27 ,       0,       0,       0,       0
sgpcmbeC1.c1,2007,0421:30:00,25 ,       0,       0,       0,       0
sgpcmbeC1.c1,2007,0422:30:00,26 ,       0,       0,       0,       0
sgpcmbeC1.c1,2007,0423:30:00,23 ,       0,       0,       0,       0