datastream, year, month, tod,n, min, max, mean, std
sgpcmbeC1.c1,2006,08 0:30:00,29 ,       0,       0,       0,       0
sgpcmbeC1.c1,2006,08 1:30:00,28 ,       0,0.087506,0.003125,0.016537
sgpcmbeC1.c1,2006,08 2:30:00,29 ,       0,       0,       0,       0
sgpcmbeC1.c1,2006,08 3:30:00,31 ,       0,       0,       0,       0
sgpcmbeC1.c1,2006,08 4:30:00,31 ,       0,       0,       0,       0
sgpcmbeC1.c1,2006,08 5:30:00,31 ,       0,1.056057,0.091599,0.205416
sgpcmbeC1.c1,2006,08 6:30:00,31 ,0.037104,57.43208,20.97208,21.11016
sgpcmbeC1.c1,2006,08 7:30:00,31 ,0.000502,210.7654,106.5656,78.01845
sgpcmbeC1.c1,2006,08 8:30:00,31 ,0.167423,393.6088,221.6931,150.6839
sgpcmbeC1.c1,2006,08 9:30:00,31 , 2.66391,556.5513,317.8664,212.9146
sgpcmbeC1.c1,2006,0810:30:00,31 ,1.760254,699.5537,418.4723, 255.476
sgpcmbeC1.c1,2006,0811:30:00,31 ,1.264709,796.8951,501.8289,289.1059
sgpcmbeC1.c1,2006,0812:30:00,31 ,1.235718,831.1998,519.9004,262.7239
sgpcmbeC1.c1,2006,0813:30:00,31 ,0.215622,816.9419,487.4027,238.1285
sgpcmbeC1.c1,2006,0814:30:00,31 ,1.766602,728.6418,428.4835,216.3487
sgpcmbeC1.c1,2006,0815:30:00,31 ,0.005375, 567.608, 336.534, 175.137
sgpcmbeC1.c1,2006,0816:30:00,31 ,       0, 403.465, 226.117,133.6883
sgpcmbeC1.c1,2006,0817:30:00,31 ,       0,236.4985,121.3847,73.36418
sgpcmbeC1.c1,2006,0818:30:00,31 ,       0, 76.7709,29.12853,23.60177
sgpcmbeC1.c1,2006,0819:30:00,31 ,       0,4.140435, 0.44982,1.009724
sgpcmbeC1.c1,2006,0820:30:00,31 ,       0,       0,       0,       0
sgpcmbeC1.c1,2006,0821:30:00,30 ,       0,       0,       0,       0
sgpcmbeC1.c1,2006,0822:30:00,30 ,       0,       0,       0,       0
sgpcmbeC1.c1,2006,0823:30:00,31 ,       0,       0,       0,       0