datastream, year, month, tod,n, min, max, mean, std
sgpcmbeC1.c1,2005,04 0:30:00,30 ,       0,0.040262,0.001342,0.007351
sgpcmbeC1.c1,2005,04 1:30:00,30 ,       0,       0,       0,       0
sgpcmbeC1.c1,2005,04 2:30:00,30 ,       0,       0,       0,       0
sgpcmbeC1.c1,2005,04 3:30:00,30 ,       0,       0,       0,       0
sgpcmbeC1.c1,2005,04 4:30:00,30 ,       0,       0,       0,       0
sgpcmbeC1.c1,2005,04 5:30:00,30 ,       0,2.334222, 0.30855,0.608061
sgpcmbeC1.c1,2005,04 6:30:00,30 ,0.695643, 37.7909,16.53771,11.00607
sgpcmbeC1.c1,2005,04 7:30:00,30 ,4.364149,87.45068,49.70152,26.27052
sgpcmbeC1.c1,2005,04 8:30:00,30 ,9.129364,130.2807,  84.536,34.42301
sgpcmbeC1.c1,2005,04 9:30:00,30 ,26.02375,155.3882,111.1224,42.25141
sgpcmbeC1.c1,2005,0410:30:00,30 ,9.752511, 170.736,130.7626,47.72106
sgpcmbeC1.c1,2005,0411:30:00,30 ,30.76246,183.5228,143.2199,45.07939
sgpcmbeC1.c1,2005,0412:30:00,30 , 19.0029,184.3943,144.9833,40.71152
sgpcmbeC1.c1,2005,0413:30:00,30 ,14.10449, 180.376,140.6221,43.81273
sgpcmbeC1.c1,2005,0414:30:00,30 ,18.18158,169.7632, 130.459,45.25036
sgpcmbeC1.c1,2005,0415:30:00,30 ,11.60108,157.0462, 109.014,38.42476
sgpcmbeC1.c1,2005,0416:30:00,30 ,32.35811, 126.769,88.90872,26.35402
sgpcmbeC1.c1,2005,0417:30:00,30 ,11.88101,78.60455,49.27259,21.03774
sgpcmbeC1.c1,2005,0418:30:00,30 ,1.287572, 31.6473,15.43654,8.555225
sgpcmbeC1.c1,2005,0419:30:00,30 ,       0,1.239952, 0.09972,0.249891
sgpcmbeC1.c1,2005,0420:30:00,30 ,       0,       0,       0,       0
sgpcmbeC1.c1,2005,0421:30:00,30 ,       0,       0,       0,       0
sgpcmbeC1.c1,2005,0422:30:00,30 ,       0,0.006892, 0.00023,0.001258
sgpcmbeC1.c1,2005,0423:30:00,30 ,       0,0.033958,0.001132,  0.0062