datastream, year, month, tod,n, min, max, mean, std
sgpcmbeC1.c1,2007,08 0:30:00,3 ,       0, 22.4904,8.769563,12.03498
sgpcmbeC1.c1,2007,08 1:30:00,3 ,       0,11.52247,4.301683,6.291479
sgpcmbeC1.c1,2007,08 2:30:00,3 ,0.090395,12.02471,4.220731,  6.7623
sgpcmbeC1.c1,2007,08 3:30:00,3 , 0.03072,13.43931,4.631472,7.630351
sgpcmbeC1.c1,2007,08 4:30:00,3 ,0.329213,22.41202,8.593861,12.04341
sgpcmbeC1.c1,2007,08 5:30:00,3 ,0.260472,55.47682,19.84183,30.91117
sgpcmbeC1.c1,2007,08 6:30:00,3 ,0.080679, 34.2392,12.92452, 18.5881
sgpcmbeC1.c1,2007,08 7:30:00,3 ,0.512074,14.81437,6.085752,7.655335
sgpcmbeC1.c1,2007,08 8:30:00,3 ,1.307297, 10.7746,4.677346,5.290151
sgpcmbeC1.c1,2007,08 9:30:00,3 ,0.456616,17.32236,6.485199, 9.40506
sgpcmbeC1.c1,2007,0810:30:00,2 ,1.270927,31.08038,16.17565,21.07847
sgpcmbeC1.c1,2007,0811:30:00,2 ,1.997792,28.94303,15.47041,19.05316
sgpcmbeC1.c1,2007,0812:30:00,2 ,4.445932, 27.0493,15.74762,15.98299
sgpcmbeC1.c1,2007,0813:30:00,2 ,0.925824,21.11072,11.01827,14.27288
sgpcmbeC1.c1,2007,0814:30:00,2 ,0.108993,10.56967,5.339332,7.396816
sgpcmbeC1.c1,2007,0815:30:00,2 ,0.075764,7.999558,4.037661,5.602969
sgpcmbeC1.c1,2007,0816:30:00,2 ,0.022168,9.691607,4.856887,6.837326
sgpcmbeC1.c1,2007,0817:30:00,2 ,0.073916,8.188524, 4.13122,5.737894
sgpcmbeC1.c1,2007,0818:30:00,2 ,0.010133,6.494356,3.252245,4.585038
sgpcmbeC1.c1,2007,0819:30:00,2 ,0.071426,5.474835,2.773131,3.820787
sgpcmbeC1.c1,2007,0820:30:00,2 , 0.07128,6.787079, 3.42918,4.748787
sgpcmbeC1.c1,2007,0821:30:00,2 ,       0, 4.19727,2.098635,2.967918
sgpcmbeC1.c1,2007,0822:30:00,2 ,0.064869,4.403087,2.233978,3.067583
sgpcmbeC1.c1,2007,0823:30:00,2 ,0.027797,3.552153,1.789975,2.492096