datastream, year, month, tod,n, min, max, mean, std
sgpcmbeC1.c1,2007,08 0:30:00,3 ,       0,24.22489,9.355556, 13.0197
sgpcmbeC1.c1,2007,08 1:30:00,3 ,       0,14.50594,5.110067,8.147495
sgpcmbeC1.c1,2007,08 2:30:00,3 ,0.064322,   14.35,4.936901,8.153674
sgpcmbeC1.c1,2007,08 3:30:00,3 ,0.009229,16.04801,5.505761,9.132638
sgpcmbeC1.c1,2007,08 4:30:00,3 ,0.215721,25.62489,9.921361,13.72543
sgpcmbeC1.c1,2007,08 5:30:00,3 ,0.176242,56.83587,20.50481,31.53788
sgpcmbeC1.c1,2007,08 6:30:00,3 , 0.03704,37.09389,14.22546,19.99524
sgpcmbeC1.c1,2007,08 7:30:00,3 ,0.279246,16.01529,6.675269,8.270799
sgpcmbeC1.c1,2007,08 8:30:00,3 ,0.954502,12.49452,5.150012,6.382017
sgpcmbeC1.c1,2007,08 9:30:00,3 ,0.303749,18.74466,6.833967,10.33097
sgpcmbeC1.c1,2007,0810:30:00,2 ,1.202245,31.21354,16.20789,21.22119
sgpcmbeC1.c1,2007,0811:30:00,2 , 1.87283,30.62778,16.25031,20.33282
sgpcmbeC1.c1,2007,0812:30:00,2 ,  4.7394,28.86722,16.80331,17.06095
sgpcmbeC1.c1,2007,0813:30:00,2 ,0.897761,21.90507,11.40142,14.85441
sgpcmbeC1.c1,2007,0814:30:00,2 ,0.097123,11.14564,5.621382,7.812481
sgpcmbeC1.c1,2007,0815:30:00,2 ,0.062785,8.776838,4.419812,6.161766
sgpcmbeC1.c1,2007,0816:30:00,2 ,  0.0828,10.27669,5.179745,7.208169
sgpcmbeC1.c1,2007,0817:30:00,2 ,0.108454,9.037642,4.573048,6.313889
sgpcmbeC1.c1,2007,0818:30:00,2 ,       0,7.568442,3.784221,5.351697
sgpcmbeC1.c1,2007,0819:30:00,2 ,0.035479, 6.11266, 3.07407,4.297216
sgpcmbeC1.c1,2007,0820:30:00,2 ,0.055422, 8.12017,4.087796,5.702638
sgpcmbeC1.c1,2007,0821:30:00,2 ,       0, 5.20375,2.601875,3.679607
sgpcmbeC1.c1,2007,0822:30:00,2 ,0.034067,5.438057,2.736062,3.821198
sgpcmbeC1.c1,2007,0823:30:00,2 ,0.141682,3.822063,1.981872,2.602422