datastream, year, month, tod,n, min, max, mean, std
sgpcmbeC1.c1,2002,05 0:30:00,30 ,       0,       0,       0,       0
sgpcmbeC1.c1,2002,05 1:30:00,30 ,       0,       0,       0,       0
sgpcmbeC1.c1,2002,05 2:30:00,30 ,       0,       0,       0,       0
sgpcmbeC1.c1,2002,05 3:30:00,30 ,       0,       0,       0,       0
sgpcmbeC1.c1,2002,05 4:30:00,30 ,       0,       0,       0,       0
sgpcmbeC1.c1,2002,05 5:30:00,30 ,       0,8.656295,3.497803,2.524783
sgpcmbeC1.c1,2002,05 6:30:00,31 ,0.417951,16.32598, 8.67843,4.643982
sgpcmbeC1.c1,2002,05 7:30:00,31 ,1.783706,30.08347,12.87215, 6.97927
sgpcmbeC1.c1,2002,05 8:30:00,31 ,1.895358,39.05463, 13.7882,9.777234
sgpcmbeC1.c1,2002,05 9:30:00,31 ,2.296922,44.53756,18.00982,12.96016
sgpcmbeC1.c1,2002,0510:30:00,31 ,1.733614,40.85703,15.90495,12.83915
sgpcmbeC1.c1,2002,0511:30:00,31 ,0.630659,60.24488,14.76488,12.84059
sgpcmbeC1.c1,2002,0512:30:00,31 ,0.508853,43.33875,15.33854,14.03475
sgpcmbeC1.c1,2002,0513:30:00,31 ,1.069758,46.93055,13.91827,13.02631
sgpcmbeC1.c1,2002,0514:30:00,31 ,0.349378, 47.7853,15.48016,12.88925
sgpcmbeC1.c1,2002,0515:30:00,31 ,1.004228,41.54307,15.47122,12.11607
sgpcmbeC1.c1,2002,0516:30:00,31 ,1.355161,29.20743,12.10384,6.640819
sgpcmbeC1.c1,2002,0517:30:00,31 ,1.398597,25.88686,12.21732,5.810534
sgpcmbeC1.c1,2002,0518:30:00,31 , 0.27993, 16.2694,10.04116,4.893269
sgpcmbeC1.c1,2002,0519:30:00,31 ,       0,6.757481,2.301785,1.915542
sgpcmbeC1.c1,2002,0520:30:00,31 ,       0,       0,       0,       0
sgpcmbeC1.c1,2002,0521:30:00,31 ,       0,       0,       0,       0
sgpcmbeC1.c1,2002,0522:30:00,30 ,       0,0.048636,0.001621, 0.00888
sgpcmbeC1.c1,2002,0523:30:00,30 ,       0,       0,       0,       0