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 ,       0,0.005696,0.000203,0.001077
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, 1.14872,0.103531,0.275053
sgpcmbeC1.c1,2002,04 6:30:00,29 ,       0,28.70112,9.196105, 8.67607
sgpcmbeC1.c1,2002,04 7:30:00,29 ,1.625448,69.34863, 30.8894, 21.6515
sgpcmbeC1.c1,2002,04 8:30:00,29 ,1.610595,101.8876,55.73762,36.56645
sgpcmbeC1.c1,2002,04 9:30:00,29 ,2.202552,127.6248,69.32234,46.98118
sgpcmbeC1.c1,2002,0410:30:00,29 ,3.564038,149.7297, 85.2499,54.09203
sgpcmbeC1.c1,2002,0411:30:00,29 ,11.90849,161.8476, 99.0824,54.70834
sgpcmbeC1.c1,2002,0412:30:00,29 , 11.4274,165.8595, 106.204,55.40986
sgpcmbeC1.c1,2002,0413:30:00,28 ,10.06239,161.8526,103.6341,51.64974
sgpcmbeC1.c1,2002,0414:30:00,28 , 4.18513, 149.379,96.66261,50.20109
sgpcmbeC1.c1,2002,0415:30:00,28 , 10.1976,127.7038,85.52162,41.21056
sgpcmbeC1.c1,2002,0416:30:00,28 ,3.716491,100.0936,62.23235,33.97968
sgpcmbeC1.c1,2002,0417:30:00,28 ,1.970883,62.63023,  34.974,20.47738
sgpcmbeC1.c1,2002,0418:00:00,17 ,1.679891, 146.509,69.70073, 40.1725
sgpcmbeC1.c1,2002,0418:30:00,30 ,       0,26.59225,12.40517,7.331539
sgpcmbeC1.c1,2002,0419:30:00,30 ,       0,0.375287,0.042733,0.103876
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 ,       0,0.091662,0.004551,0.018348
sgpcmbeC1.c1,2002,0423:30:00,29 ,       0,       0,       0,       0