datastream, year, month, tod,n, min, max, mean, std
sgpcmbeC1.c1,2003,02 0:30:00,26 ,       0,0.003074,0.000118,0.000603
sgpcmbeC1.c1,2003,02 1:30:00,20 ,       0,       0,       0,       0
sgpcmbeC1.c1,2003,02 2:30:00,20 ,       0,       0,       0,       0
sgpcmbeC1.c1,2003,02 3:30:00,20 ,       0,0.002433,0.000122,0.000544
sgpcmbeC1.c1,2003,02 4:30:00,22 ,       0,       0,       0,       0
sgpcmbeC1.c1,2003,02 5:30:00,24 ,       0,       0,       0,       0
sgpcmbeC1.c1,2003,02 6:30:00,28 ,       0,       0,       0,       0
sgpcmbeC1.c1,2003,02 7:30:00,28 ,0.229355,28.18022,7.385337,8.050547
sgpcmbeC1.c1,2003,02 8:30:00,28 ,2.626888,145.2676,45.44137,39.74895
sgpcmbeC1.c1,2003,02 9:30:00,28 ,6.706202,279.2072,93.11438,75.43155
sgpcmbeC1.c1,2003,0210:30:00,28 , 7.37159,380.2993,144.6544,110.6901
sgpcmbeC1.c1,2003,0211:30:00,28 ,9.268826,473.3102,172.5397,139.8384
sgpcmbeC1.c1,2003,0212:30:00,28 ,14.78221,555.2442,183.0299,150.4284
sgpcmbeC1.c1,2003,0213:30:00,28 ,10.15406,534.5129,176.6799,144.0835
sgpcmbeC1.c1,2003,0214:30:00,28 ,12.13831,395.4611,146.8973,115.9135
sgpcmbeC1.c1,2003,0215:30:00,28 , 8.53128,313.8617,112.9551, 87.4026
sgpcmbeC1.c1,2003,0216:30:00,28 ,4.031825,270.0987,71.47969,61.87723
sgpcmbeC1.c1,2003,0217:30:00,28 ,0.886608,101.8378,23.78638,23.07165
sgpcmbeC1.c1,2003,0218:30:00,28 ,       0,3.850843,0.677065,1.212733
sgpcmbeC1.c1,2003,0219:30:00,28 ,       0,       0,       0,       0
sgpcmbeC1.c1,2003,0220:30:00,26 ,       0,       0,       0,       0
sgpcmbeC1.c1,2003,0221:30:00,23 ,       0,       0,       0,       0
sgpcmbeC1.c1,2003,0222:30:00,21 ,       0,       0,       0,       0
sgpcmbeC1.c1,2003,0223:30:00,22 ,       0,       0,       0,       0