datastream, year, month, tod,n, min, max, mean, std
sgpcmbeC1.c1,2002,04 0:30:00,30 ,       0,       0,       0,       0
sgpcmbeC1.c1,2002,04 1:30:00,28 ,       0,       0,       0,       0
sgpcmbeC1.c1,2002,04 2:30:00,28 ,       0,       0,       0,       0
sgpcmbeC1.c1,2002,04 3:30:00,28 ,       0,       0,       0,       0
sgpcmbeC1.c1,2002,04 4:30:00,29 ,       0,       0,       0,       0
sgpcmbeC1.c1,2002,04 5:30:00,30 ,       0,5.224742,0.644768,1.298354
sgpcmbeC1.c1,2002,04 6:30:00,29 ,       0,85.11404, 26.5314,19.12362
sgpcmbeC1.c1,2002,04 7:30:00,29 ,10.78129,204.6562,78.65811, 40.4729
sgpcmbeC1.c1,2002,04 8:30:00,29 ,16.28913,325.9592,124.8062,68.34995
sgpcmbeC1.c1,2002,04 9:30:00,29 ,19.29945,420.8758,161.7373, 95.3907
sgpcmbeC1.c1,2002,0410:30:00,29 , 25.4898,425.3999,190.0704,109.4279
sgpcmbeC1.c1,2002,0411:30:00,29 ,84.57687, 567.322,229.2378,138.3222
sgpcmbeC1.c1,2002,0412:30:00,29 ,79.41268,526.6201,225.7343,141.1787
sgpcmbeC1.c1,2002,0413:30:00,28 ,81.66717,543.8734,233.1339,135.6027
sgpcmbeC1.c1,2002,0414:30:00,28 ,30.47176,462.8301,203.5375,116.0165
sgpcmbeC1.c1,2002,0415:30:00,28 ,71.51253,368.9464,176.4433,90.07401
sgpcmbeC1.c1,2002,0416:30:00,28 ,29.17877,272.5588,132.4678,61.50905
sgpcmbeC1.c1,2002,0417:30:00,28 , 12.0146, 177.512, 86.9632, 39.9394
sgpcmbeC1.c1,2002,0418:00:00,17 ,8.904115,511.4787, 210.621,149.2805
sgpcmbeC1.c1,2002,0418:30:00,30 ,0.412515,76.53149,35.56487,19.12884
sgpcmbeC1.c1,2002,0419:30:00,30 ,       0,3.567574,0.741764,1.064264
sgpcmbeC1.c1,2002,0420:30:00,30 ,       0,       0,       0,       0
sgpcmbeC1.c1,2002,0421:30:00,30 ,       0,       0,       0,       0
sgpcmbeC1.c1,2002,0422:30:00,29 ,       0,       0,       0,       0
sgpcmbeC1.c1,2002,0423:30:00,29 ,       0,       0,       0,       0