datastream, year, month, tod,n, min, max, mean, std
sgpcmbeC1.c1,2007,07 0:30:00,31 ,       0,0.088971, 0.00287, 0.01598
sgpcmbeC1.c1,2007,07 1:30:00,31 ,       0,       0,       0,       0
sgpcmbeC1.c1,2007,07 2:30:00,31 ,       0,       0,       0,       0
sgpcmbeC1.c1,2007,07 3:30:00,31 ,       0,       0,       0,       0
sgpcmbeC1.c1,2007,07 4:30:00,31 ,       0,       0,       0,       0
sgpcmbeC1.c1,2007,07 5:30:00,31 ,       0,7.713191,2.579439,2.046086
sgpcmbeC1.c1,2007,07 6:30:00,31 ,       0,42.74943,23.24416,13.35405
sgpcmbeC1.c1,2007,07 7:30:00,31 ,2.077217, 85.0975,50.56381,29.61834
sgpcmbeC1.c1,2007,07 8:30:00,31 ,4.257871,133.4823,90.24624, 38.2056
sgpcmbeC1.c1,2007,07 9:30:00,31 ,27.45728,163.9177,117.4087, 39.3687
sgpcmbeC1.c1,2007,0710:30:00,31 ,43.98163,171.8657,134.7145,40.49515
sgpcmbeC1.c1,2007,0711:30:00,31 ,40.84192,189.6372,141.0658, 37.6703
sgpcmbeC1.c1,2007,0712:30:00,31 , 67.9236, 191.778,148.3142,36.14874
sgpcmbeC1.c1,2007,0713:30:00,31 ,31.76408,191.3836,140.5408,43.70874
sgpcmbeC1.c1,2007,0714:30:00,30 ,22.85297,177.8929,135.3218,37.46013
sgpcmbeC1.c1,2007,0715:30:00,31 ,34.20486,164.8642,118.9516,37.94553
sgpcmbeC1.c1,2007,0716:30:00,31 ,23.91727,128.7358,96.97511,26.97766
sgpcmbeC1.c1,2007,0717:30:00,31 ,19.45537,94.93443,70.38151,21.03198
sgpcmbeC1.c1,2007,0718:30:00,31 ,8.924865,56.67078,35.35384,12.58397
sgpcmbeC1.c1,2007,0719:30:00,31 ,0.344635,  11.377,5.952036,3.448195
sgpcmbeC1.c1,2007,0720:30:00,30 ,       0,0.013008,0.000434,0.002375
sgpcmbeC1.c1,2007,0721:30:00,31 ,       0,       0,       0,       0
sgpcmbeC1.c1,2007,0722:30:00,31 ,       0,       0,       0,       0
sgpcmbeC1.c1,2007,0723:30:00,31 ,       0,       0,       0,       0