datastream, year, month, tod,n, min, max, mean, std
sgpcmbeC1.c1,2005,08 0:30:00,31 ,       0,0.021272,0.000686,0.003821
sgpcmbeC1.c1,2005,08 1:30:00,30 ,       0,0.006107,0.000204,0.001115
sgpcmbeC1.c1,2005,08 2:30:00,31 ,       0,0.002202,0.000071,0.000396
sgpcmbeC1.c1,2005,08 3:30:00,31 ,       0,       0,       0,       0
sgpcmbeC1.c1,2005,08 4:30:00,31 ,       0,       0,       0,       0
sgpcmbeC1.c1,2005,08 5:30:00,31 ,       0,2.354841,0.444412,0.619624
sgpcmbeC1.c1,2005,08 6:30:00,31 ,1.302983,42.94323,16.88554,10.09966
sgpcmbeC1.c1,2005,08 7:30:00,31 ,2.601274,78.19508,50.80422, 20.1656
sgpcmbeC1.c1,2005,08 8:30:00,31 , 8.56489, 126.434, 77.8819, 34.6691
sgpcmbeC1.c1,2005,08 9:30:00,31 ,13.92289,  146.96,104.5322,37.93319
sgpcmbeC1.c1,2005,0810:30:00,31 ,19.21463,167.4897,117.2648,40.74952
sgpcmbeC1.c1,2005,0811:30:00,31 , 12.5052,178.9075,130.6426,42.06402
sgpcmbeC1.c1,2005,0812:30:00,31 ,26.46777,186.1126,130.7894,42.78415
sgpcmbeC1.c1,2005,0813:30:00,31 ,25.54568,180.1171,121.3757,39.79859
sgpcmbeC1.c1,2005,0814:30:00,31 ,3.941134,174.0405,109.0392,44.76431
sgpcmbeC1.c1,2005,0815:30:00,31 ,1.152239, 149.065,95.62181,40.62982
sgpcmbeC1.c1,2005,0816:30:00,31 ,0.313269,121.1954,67.41057,36.82261
sgpcmbeC1.c1,2005,0817:30:00,31 ,0.009149,81.89733,41.41931,25.74584
sgpcmbeC1.c1,2005,0818:30:00,31 ,       0,35.79485,16.09139,11.55441
sgpcmbeC1.c1,2005,0819:30:00,31 ,       0,3.749184,0.751719,1.207721
sgpcmbeC1.c1,2005,0820:30:00,31 ,       0,0.046382,0.001496, 0.00833
sgpcmbeC1.c1,2005,0821:30:00,31 ,       0,       0,       0,       0
sgpcmbeC1.c1,2005,0822:30:00,31 ,       0,0.000102, 3.28E-6,0.000018
sgpcmbeC1.c1,2005,0823:30:00,31 ,       0, 0.06001,0.001936,0.010778