datastream, year, month, tod,n, min, max, mean, std
sgpcmbeC1.c1,2003,03 0:30:00,25 ,       0,   1.416, 0.05664,  0.2832
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 ,       0,0.112541,0.003881,0.020898
sgpcmbeC1.c1,2003,03 5:30:00,31 ,       0,       0,       0,       0
sgpcmbeC1.c1,2003,03 6:30:00,31 ,       0,36.43658,7.976707,10.85036
sgpcmbeC1.c1,2003,03 7:30:00,31 ,9.279087,73.99146,37.26546,21.96998
sgpcmbeC1.c1,2003,03 8:30:00,31 ,8.600854,127.2148,56.07621,30.61041
sgpcmbeC1.c1,2003,03 9:30:00,31 ,4.062953,163.3174,52.91603,30.76037
sgpcmbeC1.c1,2003,0310:30:00,31 ,17.10349,213.4666,65.96347,45.80055
sgpcmbeC1.c1,2003,0311:30:00,31 ,16.78525,183.3877, 63.2925,52.72741
sgpcmbeC1.c1,2003,0312:30:00,31 ,2.887848,295.3706,61.56511,82.78664
sgpcmbeC1.c1,2003,0313:30:00,31 ,12.09271,226.1936,56.70559,58.65435
sgpcmbeC1.c1,2003,0314:30:00,31 ,22.26801,223.1221,74.29911,59.05386
sgpcmbeC1.c1,2003,0315:30:00,31 ,9.180615,204.8335,76.86793,53.63476
sgpcmbeC1.c1,2003,0316:30:00,31 ,2.611932,142.0801, 56.3943,28.00665
sgpcmbeC1.c1,2003,0317:30:00,31 ,13.53807,75.24641,49.74523,19.93636
sgpcmbeC1.c1,2003,0318:30:00,31 ,1.574429,41.75351,20.29795,11.65744
sgpcmbeC1.c1,2003,0319:30:00,31 ,       0,1.431009,0.196155,0.460229
sgpcmbeC1.c1,2003,0320:30:00,31 ,       0, 0.83246,0.029363,0.149701
sgpcmbeC1.c1,2003,0321:30:00,28 ,       0,1.301132,0.046469,0.245891
sgpcmbeC1.c1,2003,0322:30:00,27 ,       0,       0,       0,       0
sgpcmbeC1.c1,2003,0323:30:00,26 ,       0,       0,       0,       0