datastream, year, month, tod,n, min, max, mean, std
sgpcmbeC1.c1,2005,07 0:30:00,31 ,       0, 1.18845,0.092827,0.296361
sgpcmbeC1.c1,2005,07 1:30:00,31 ,       0,0.948726,0.071215,0.226427
sgpcmbeC1.c1,2005,07 2:30:00,31 ,       0,0.793157,0.070955,0.220954
sgpcmbeC1.c1,2005,07 3:30:00,31 ,       0,       0,       0,       0
sgpcmbeC1.c1,2005,07 4:30:00,31 ,       0,       0,       0,       0
sgpcmbeC1.c1,2005,07 5:30:00,31 ,       0,17.78468,10.74175,4.020581
sgpcmbeC1.c1,2005,07 6:30:00,31 ,7.459501,96.22392,21.62915,16.24131
sgpcmbeC1.c1,2005,07 7:30:00,29 ,1.553137,58.53704, 20.0075,17.27696
sgpcmbeC1.c1,2005,07 8:30:00,29 , 2.30548,47.90606,14.52631,11.98847
sgpcmbeC1.c1,2005,07 9:30:00,29 , 2.18727,95.51112, 24.9987,29.18175
sgpcmbeC1.c1,2005,0710:30:00,29 ,1.418849,66.17643,21.47679,23.00885
sgpcmbeC1.c1,2005,0711:30:00,29 , 1.65008,133.4752, 22.2984, 25.9926
sgpcmbeC1.c1,2005,0712:30:00,30 ,0.999254, 470.328,38.34758,83.54347
sgpcmbeC1.c1,2005,0713:30:00,31 ,1.420189,363.1674,42.81692,68.69995
sgpcmbeC1.c1,2005,0714:30:00,31 ,1.643922, 296.615,34.73026,59.12656
sgpcmbeC1.c1,2005,0715:30:00,31 ,1.157746,264.9503,34.07795,50.80668
sgpcmbeC1.c1,2005,0716:30:00,30 ,1.712437,43.55044,15.31739,12.89522
sgpcmbeC1.c1,2005,0717:30:00,30 ,2.387276,70.35541,16.13032, 15.1339
sgpcmbeC1.c1,2005,0718:30:00,30 ,3.765229,31.44045,14.38407,7.320128
sgpcmbeC1.c1,2005,0719:30:00,31 ,2.212675,30.42621,15.41524,6.730854
sgpcmbeC1.c1,2005,0720:30:00,31 ,       0,2.804607,0.194442,0.545606
sgpcmbeC1.c1,2005,0721:30:00,31 ,       0,0.867827,0.074906,0.233689
sgpcmbeC1.c1,2005,0722:30:00,31 ,       0,0.686121,0.052559, 0.16978
sgpcmbeC1.c1,2005,0723:30:00,31 ,       0,1.082027,0.106603,0.287247