datastream, year, month, tod,n, min, max, mean, std
sgpcmbeC1.c1,2004,01 0:30:00,30 ,       0,0.008434,0.000281, 0.00154
sgpcmbeC1.c1,2004,01 1:30:00,28 ,       0,       0,       0,       0
sgpcmbeC1.c1,2004,01 2:30:00,28 ,       0,0.039398,0.001411,0.007445
sgpcmbeC1.c1,2004,01 3:30:00,25 ,       0,       0,       0,       0
sgpcmbeC1.c1,2004,01 4:30:00,25 ,       0,0.002137,0.000085,0.000427
sgpcmbeC1.c1,2004,01 5:30:00,29 ,       0,0.009326,0.000322,0.001732
sgpcmbeC1.c1,2004,01 6:30:00,30 ,       0,0.096841,0.003454,0.017655
sgpcmbeC1.c1,2004,01 7:30:00,31 ,       0,4.312856,0.775882,0.950281
sgpcmbeC1.c1,2004,01 8:30:00,31 ,0.121776,59.15462,18.10159,14.02012
sgpcmbeC1.c1,2004,01 9:30:00,31 ,2.654296,146.1982,44.86684, 32.8041
sgpcmbeC1.c1,2004,0110:30:00,31 ,4.721765,217.4795,66.59857,45.53368
sgpcmbeC1.c1,2004,0111:30:00,31 ,3.682887,253.7405,83.23632,52.63278
sgpcmbeC1.c1,2004,0112:30:00,31 ,4.145164,249.6327,90.06942,  53.711
sgpcmbeC1.c1,2004,0113:30:00,31 ,5.857696, 211.352,88.64391, 48.6267
sgpcmbeC1.c1,2004,0114:30:00,31 ,8.053929,164.1867,77.53078,38.77561
sgpcmbeC1.c1,2004,0115:30:00,31 , 3.02342,112.1748,56.17958,28.30247
sgpcmbeC1.c1,2004,0116:30:00,31 , 2.60517,63.03992,28.99925,15.72406
sgpcmbeC1.c1,2004,0117:30:00,31 ,       0,13.67407,   3.832,3.702793
sgpcmbeC1.c1,2004,0118:30:00,31 ,       0,       0,       0,       0
sgpcmbeC1.c1,2004,0119:30:00,31 ,       0,0.010458,0.000337,0.001878
sgpcmbeC1.c1,2004,0120:30:00,30 ,       0,0.111081,0.003714,0.020279
sgpcmbeC1.c1,2004,0121:30:00,29 ,       0,0.004947,0.000186,0.000919
sgpcmbeC1.c1,2004,0122:30:00,29 ,       0,       0,       0,       0
sgpcmbeC1.c1,2004,0123:30:00,29 ,       0,       0,       0,       0