datastream, year, month, tod,n, min, max, mean, std
sgpcmbeC1.c1,2004,12 0:30:00,31 ,       0,0.001553, 0.00005,0.000279
sgpcmbeC1.c1,2004,12 1:30:00,31 ,       0,       0,       0,       0
sgpcmbeC1.c1,2004,12 2:30:00,31 ,       0,0.031271,0.001009,0.005616
sgpcmbeC1.c1,2004,12 3:30:00,31 ,       0,0.032929,0.001062,0.005914
sgpcmbeC1.c1,2004,12 4:30:00,31 ,       0,       0,       0,       0
sgpcmbeC1.c1,2004,12 5:30:00,31 ,       0,       0,       0,       0
sgpcmbeC1.c1,2004,12 6:30:00,31 ,       0,       0,       0,       0
sgpcmbeC1.c1,2004,12 7:30:00,31 ,0.015868,8.642445,2.439789,2.090663
sgpcmbeC1.c1,2004,12 8:30:00,31 ,2.531248,  40.231,25.31542,10.49537
sgpcmbeC1.c1,2004,12 9:30:00,31 ,5.906721,71.47179,52.68892,18.63163
sgpcmbeC1.c1,2004,1210:30:00,31 ,5.400795,97.36265,74.57732,25.41784
sgpcmbeC1.c1,2004,1211:30:00,31 ,4.857644,111.3513,89.15374, 28.5262
sgpcmbeC1.c1,2004,1212:30:00,31 ,5.417573,116.9342,92.09676,29.44738
sgpcmbeC1.c1,2004,1213:30:00,31 ,9.698035,110.5807,90.47678,27.08029
sgpcmbeC1.c1,2004,1214:30:00,31 ,0.449025,95.37774,73.30612,23.94116
sgpcmbeC1.c1,2004,1215:30:00,31 ,  1.5869,66.48071,50.27748, 15.2002
sgpcmbeC1.c1,2004,1216:30:00,31 ,2.346684,29.78905,19.86895, 6.53846
sgpcmbeC1.c1,2004,1217:30:00,29 ,       0,  3.6827,1.248594,1.021654
sgpcmbeC1.c1,2004,1218:30:00,31 ,       0,       0,       0,       0
sgpcmbeC1.c1,2004,1219:30:00,31 ,       0,       0,       0,       0
sgpcmbeC1.c1,2004,1220:30:00,31 ,       0,0.008868,0.000286,0.001593
sgpcmbeC1.c1,2004,1221:30:00,31 ,       0,0.028364,0.000915,0.005094
sgpcmbeC1.c1,2004,1222:30:00,31 ,       0,       0,       0,       0
sgpcmbeC1.c1,2004,1223:30:00,31 ,       0,       0,       0,       0