datastream, year, month, tod,n, min, max, mean, std
sgpcmbeC1.c1,2006,06 0:30:00,30 ,       0,       0,       0,       0
sgpcmbeC1.c1,2006,06 1:30:00,30 ,       0,0.258199,0.011192,0.048752
sgpcmbeC1.c1,2006,06 2:30:00,30 ,       0,0.000788,0.000026,0.000144
sgpcmbeC1.c1,2006,06 3:30:00,30 ,       0,       0,       0,       0
sgpcmbeC1.c1,2006,06 4:30:00,30 ,       0,       0,       0,       0
sgpcmbeC1.c1,2006,06 5:30:00,30 ,       0,10.66759,6.118405,3.357636
sgpcmbeC1.c1,2006,06 6:30:00,30 , 2.48669,27.17065,13.08156,5.853341
sgpcmbeC1.c1,2006,06 7:30:00,30 ,3.131196,40.02009,13.73494,7.819878
sgpcmbeC1.c1,2006,06 8:30:00,30 ,3.177445,33.32034,13.13417,8.711876
sgpcmbeC1.c1,2006,06 9:30:00,30 ,3.416261,48.14946,12.19664, 11.3637
sgpcmbeC1.c1,2006,0610:30:00,30 ,2.740834,64.46572,11.02892,13.92097
sgpcmbeC1.c1,2006,0611:30:00,30 ,0.545302,58.67299,12.60426,16.38853
sgpcmbeC1.c1,2006,0612:30:00,30 ,0.737251,68.14342, 16.1667,20.78306
sgpcmbeC1.c1,2006,0613:30:00,30 ,1.149699,70.76463,19.49681,21.54477
sgpcmbeC1.c1,2006,0614:30:00,30 ,2.504765, 66.5046,21.54936,19.99778
sgpcmbeC1.c1,2006,0615:30:00,30 ,3.744782,61.73349,21.53596,18.68322
sgpcmbeC1.c1,2006,0616:30:00,30 ,6.730787,42.62138,17.43357,11.13906
sgpcmbeC1.c1,2006,0617:30:00,30 ,4.715458,36.97226,15.82875,7.872638
sgpcmbeC1.c1,2006,0618:30:00,30 ,11.09852,24.61625,15.25632,3.116366
sgpcmbeC1.c1,2006,0619:30:00,30 ,1.284736,10.65799,6.738336,2.621706
sgpcmbeC1.c1,2006,0620:30:00,30 ,       0,0.441789,0.014726,0.080659
sgpcmbeC1.c1,2006,0621:30:00,30 ,       0,       0,       0,       0
sgpcmbeC1.c1,2006,0622:30:00,30 ,       0,0.040841,0.001361,0.007456
sgpcmbeC1.c1,2006,0623:30:00,30 ,       0,       0,       0,       0