datastream, year, month, tod,n, min, max, mean, std
sgpcmbeC1.c1,2003,03 0:30:00,25 ,       0,0.882654,0.035306,0.176531
sgpcmbeC1.c1,2003,03 1:30:00,25 ,       0,       0,       0,       0
sgpcmbeC1.c1,2003,03 2:30:00,27 ,       0,       0,       0,       0
sgpcmbeC1.c1,2003,03 3:30:00,26 ,       0,       0,       0,       0
sgpcmbeC1.c1,2003,03 4:30:00,29 ,       0,3.613438,0.124601,0.670999
sgpcmbeC1.c1,2003,03 5:30:00,31 ,       0,       0,       0,       0
sgpcmbeC1.c1,2003,03 6:30:00,31 ,       0,33.30548,6.160201,9.601832
sgpcmbeC1.c1,2003,03 7:30:00,31 ,10.13966,211.3987,82.69493,67.49372
sgpcmbeC1.c1,2003,03 8:30:00,31 ,27.89142,442.0228,235.0732,134.3636
sgpcmbeC1.c1,2003,03 9:30:00,31 ,41.91597,  648.22,358.7702,198.8678
sgpcmbeC1.c1,2003,0310:30:00,31 ,62.67775, 810.516,476.5747,240.5459
sgpcmbeC1.c1,2003,0311:30:00,31 ,69.03515,914.2856,565.4943,264.4522
sgpcmbeC1.c1,2003,0312:30:00,31 ,118.2901,950.4022,651.8646,267.2092
sgpcmbeC1.c1,2003,0313:30:00,31 , 87.5011,919.2826,657.1931,260.3657
sgpcmbeC1.c1,2003,0314:30:00,31 ,79.37129, 827.588,570.5534,236.9999
sgpcmbeC1.c1,2003,0315:30:00,31 ,38.27935,672.2149,450.4357,190.3527
sgpcmbeC1.c1,2003,0316:30:00,31 ,17.62168,473.6381,291.6484,139.4898
sgpcmbeC1.c1,2003,0317:30:00,31 ,22.84888, 259.568,141.7268,67.67654
sgpcmbeC1.c1,2003,0318:30:00,31 ,0.691548,44.80414,19.15533,13.52578
sgpcmbeC1.c1,2003,0319:30:00,31 ,       0,0.928827,0.094735,0.240012
sgpcmbeC1.c1,2003,0320:30:00,31 ,       0, 3.34527, 0.11536,0.600877
sgpcmbeC1.c1,2003,0321:30:00,28 ,       0,0.605112,0.021611,0.114355
sgpcmbeC1.c1,2003,0322:30:00,27 ,       0,       0,       0,       0
sgpcmbeC1.c1,2003,0323:30:00,26 ,       0,       0,       0,       0