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 ,0.007171,45.52618,13.91367,14.69929
sgpcmbeC1.c1,2002,02 8:30:00,17 ,0.678169,208.3938,  102.19,76.97519
sgpcmbeC1.c1,2002,02 9:30:00,18 ,0.922226,401.3353,234.9287,145.8631
sgpcmbeC1.c1,2002,0210:30:00,18 ,1.378418,564.8445,368.7098, 192.559
sgpcmbeC1.c1,2002,0211:30:00,18 ,29.01944,672.7193,443.1567,207.1332
sgpcmbeC1.c1,2002,0212:30:00,18 ,4.900848,714.8308,437.8992,245.5172
sgpcmbeC1.c1,2002,0213:30:00,18 ,13.25491,694.9251,450.6294,248.3339
sgpcmbeC1.c1,2002,0214:30:00,18 ,12.59976,606.4816,452.5813,164.2211
sgpcmbeC1.c1,2002,0215:30:00,18 , 1.33313,456.8439,330.5442, 137.109
sgpcmbeC1.c1,2002,0216:30:00,18 ,       0,265.1569,181.3144,93.02969
sgpcmbeC1.c1,2002,0217:30:00,19 ,       0,89.35802,44.72789,34.15265
sgpcmbeC1.c1,2002,0218:30:00,19 ,       0,3.026725,0.926467,0.923487
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