datastream, year, month, tod,n, min, max, mean, std
sgpcmbeC1.c1,2002,02 0:30:00,11 ,       0, 0.05902,0.005365,0.017795
sgpcmbeC1.c1,2002,02 1:30:00,12 ,       0,       0,       0,       0
sgpcmbeC1.c1,2002,02 2:30:00,12 ,       0,       0,       0,       0
sgpcmbeC1.c1,2002,02 3:30:00,11 ,       0,       0,       0,       0
sgpcmbeC1.c1,2002,02 4:30:00,13 ,       0,       0,       0,       0
sgpcmbeC1.c1,2002,02 5:30:00,16 ,       0,       0,       0,       0
sgpcmbeC1.c1,2002,02 6:30:00,18 ,       0,       0,       0,       0
sgpcmbeC1.c1,2002,02 7:30:00,18 ,7.531759,68.23778,  33.875, 18.0792
sgpcmbeC1.c1,2002,02 8:30:00,18 ,66.09024,266.7496,182.0046,61.34775
sgpcmbeC1.c1,2002,02 9:30:00,18 ,137.7502,473.5542,   356.2,98.62806
sgpcmbeC1.c1,2002,0210:30:00,18 ,221.5601,642.6926,516.7906,126.7221
sgpcmbeC1.c1,2002,0211:30:00,18 , 407.109,755.1154,632.7252,106.0705
sgpcmbeC1.c1,2002,0212:30:00,18 ,418.3476,800.8586, 659.669,122.2648
sgpcmbeC1.c1,2002,0213:30:00,18 ,368.7335, 783.197,639.5564,124.3688
sgpcmbeC1.c1,2002,0214:30:00,18 , 395.597,693.2883,604.1051,68.48257
sgpcmbeC1.c1,2002,0215:30:00,18 ,252.6534,543.9294,456.7511,80.48161
sgpcmbeC1.c1,2002,0216:30:00,19 ,50.69415,355.7509,264.9193,83.68943
sgpcmbeC1.c1,2002,0217:30:00,19 ,19.79424,143.2561,89.53457,35.42473
sgpcmbeC1.c1,2002,0218:30:00,19 ,       0,9.065552,3.697619,2.615298
sgpcmbeC1.c1,2002,0219:30:00,19 ,       0,       0,       0,       0
sgpcmbeC1.c1,2002,0220:30:00,19 ,       0,       0,       0,       0
sgpcmbeC1.c1,2002,0221:30:00,17 ,       0,       0,       0,       0
sgpcmbeC1.c1,2002,0222:30:00,16 ,       0,       0,       0,       0
sgpcmbeC1.c1,2002,0223:30:00,16 ,       0,0.059079,0.003692, 0.01477