datastream, year, month, tod,n, min, max, mean, std
sgpcmbeC1.c1,2004,03 0:30:00,29 ,       0,0.388124,0.013384,0.072073
sgpcmbeC1.c1,2004,03 1:30:00,29 ,       0,0.805029, 0.02776, 0.14949
sgpcmbeC1.c1,2004,03 2:30:00,30 ,       0, 1.22499,0.080102,0.304901
sgpcmbeC1.c1,2004,03 3:30:00,31 ,       0,1.506851,0.048608,0.270638
sgpcmbeC1.c1,2004,03 4:30:00,30 ,       0,       0,       0,       0
sgpcmbeC1.c1,2004,03 5:30:00,30 ,       0,       0,       0,       0
sgpcmbeC1.c1,2004,03 6:30:00,31 ,       0,31.10008,6.999879,8.152902
sgpcmbeC1.c1,2004,03 7:30:00,31 ,       0,75.84581, 42.2351,22.47254
sgpcmbeC1.c1,2004,03 8:30:00,31 ,4.994138,148.8575,56.52319,32.16918
sgpcmbeC1.c1,2004,03 9:30:00,31 ,5.868561,147.9473,52.79557,32.44952
sgpcmbeC1.c1,2004,0310:30:00,31 ,13.90939,142.3432,48.08026, 27.6269
sgpcmbeC1.c1,2004,0311:30:00,31 ,16.27615,209.9777,50.11802,50.72367
sgpcmbeC1.c1,2004,0312:30:00,31 ,2.566816,155.7319,41.87511,49.94642
sgpcmbeC1.c1,2004,0313:30:00,31 ,  10.179,216.7492,61.53248,64.45985
sgpcmbeC1.c1,2004,0314:30:00,31 , 8.41399,203.5046,76.55977,62.64972
sgpcmbeC1.c1,2004,0315:30:00,31 ,9.466332,203.6512,70.58795,42.85592
sgpcmbeC1.c1,2004,0316:30:00,31 ,4.213014,167.4937,61.45793,31.49681
sgpcmbeC1.c1,2004,0317:30:00,31 ,5.645361,83.15732,50.40911,22.93861
sgpcmbeC1.c1,2004,0318:30:00,31 ,       0,37.91416,18.95293,9.834526
sgpcmbeC1.c1,2004,0319:30:00,31 ,       0,1.105455,0.131433,0.321197
sgpcmbeC1.c1,2004,0320:30:00,31 ,       0,1.342525,0.146263,0.353983
sgpcmbeC1.c1,2004,0321:30:00,31 ,       0,0.765689,  0.0247,0.137522
sgpcmbeC1.c1,2004,0322:30:00,31 ,       0,0.980413,0.053874,0.211888
sgpcmbeC1.c1,2004,0323:30:00,29 ,       0,1.444193,0.110863,0.354097