datastream, year, month, tod,n, min, max, mean, std
sgpcmbeC1.c1,2005,05 0:30:00,31 ,       0,1.320207,0.218211,0.456219
sgpcmbeC1.c1,2005,05 1:30:00,31 ,       0,1.550325, 0.15278,0.365319
sgpcmbeC1.c1,2005,05 2:30:00,31 ,       0,1.360284,0.162799,0.388944
sgpcmbeC1.c1,2005,05 3:30:00,31 ,       0,1.475874,0.142433,0.396012
sgpcmbeC1.c1,2005,05 4:30:00,31 ,       0,1.577037,0.173882,  0.4619
sgpcmbeC1.c1,2005,05 5:30:00,31 ,2.065871,25.51625,10.43492,5.456241
sgpcmbeC1.c1,2005,05 6:30:00,31 ,6.429159,44.51951,19.92902,10.06949
sgpcmbeC1.c1,2005,05 7:30:00,31 , 6.12878,89.87115,26.04306,21.92357
sgpcmbeC1.c1,2005,05 8:30:00,31 ,2.849425,119.7222,29.47467,27.79439
sgpcmbeC1.c1,2005,05 9:30:00,31 ,1.696226,129.2896,37.52762,30.75076
sgpcmbeC1.c1,2005,0510:30:00,30 ,0.888683,145.8153, 53.6957,42.44722
sgpcmbeC1.c1,2005,0511:30:00,31 ,1.319646,216.6233,52.79676,55.07358
sgpcmbeC1.c1,2005,0512:30:00,31 ,0.716853,213.0823,51.25611,48.90208
sgpcmbeC1.c1,2005,0513:30:00,31 ,1.652525,177.5647,53.01244,43.65188
sgpcmbeC1.c1,2005,0514:30:00,31 ,1.474336,124.3508,46.17046,37.48949
sgpcmbeC1.c1,2005,0515:30:00,31 ,0.984663,115.3314,34.72141,30.95033
sgpcmbeC1.c1,2005,0516:30:00,31 , 1.41392,67.02032,22.35314, 17.5416
sgpcmbeC1.c1,2005,0517:30:00,31 ,4.287703,51.85835,19.90644,12.79444
sgpcmbeC1.c1,2005,0518:30:00,31 ,2.788672,52.85559,19.96436,11.15134
sgpcmbeC1.c1,2005,0519:30:00,31 ,1.021401,25.42935,10.64923,4.948166
sgpcmbeC1.c1,2005,0520:30:00,31 ,       0,1.823876, 0.32221,0.582249
sgpcmbeC1.c1,2005,0521:30:00,31 ,       0,1.480129,0.179824,0.433794
sgpcmbeC1.c1,2005,0522:30:00,31 ,       0,1.275558, 0.17143,0.392055
sgpcmbeC1.c1,2005,0523:30:00,31 ,       0, 1.56521,0.183166, 0.38438