datastream, year, month, tod,n, min, max, mean, std
sgpcmbeC1.c1,1998,07 0:30:00,31 ,       0,1.637859,0.103713,0.401532
sgpcmbeC1.c1,1998,07 1:30:00,31 ,       0,2.066985,0.122485,0.476111
sgpcmbeC1.c1,1998,07 2:30:00,31 ,       0,2.441125,0.165884,0.509234
sgpcmbeC1.c1,1998,07 3:30:00,31 ,       0,1.103719,0.081778,0.272893
sgpcmbeC1.c1,1998,07 4:30:00,31 ,       0,1.978551,0.110668,0.433734
sgpcmbeC1.c1,1998,07 5:30:00,31 ,0.989635,20.48208,10.90358,6.202869
sgpcmbeC1.c1,1998,07 6:30:00,31 ,1.886359,65.82511,35.61139,19.05127
sgpcmbeC1.c1,1998,07 7:30:00,31 ,1.791328,124.2315,53.16294,26.00953
sgpcmbeC1.c1,1998,07 8:30:00,31 ,20.44247,163.3209, 72.0457,37.45549
sgpcmbeC1.c1,1998,07 9:30:00,31 ,27.97027,220.9791,84.49402,53.02669
sgpcmbeC1.c1,1998,0710:30:00,31 ,27.40228,233.9021,88.62072,64.94219
sgpcmbeC1.c1,1998,0711:30:00,31 ,13.49832,280.3156,110.1969,82.49876
sgpcmbeC1.c1,1998,0712:30:00,31 ,2.775717,284.5299,121.6361, 87.7951
sgpcmbeC1.c1,1998,0713:30:00,31 ,12.23673,310.1852,130.7518,97.30344
sgpcmbeC1.c1,1998,0714:30:00,31 ,26.73474, 281.864, 116.012,78.98515
sgpcmbeC1.c1,1998,0715:30:00,31 ,41.03629,251.3638,127.9792,68.22499
sgpcmbeC1.c1,1998,0716:30:00,31 ,31.68242,196.9123,91.16711,46.19197
sgpcmbeC1.c1,1998,0717:30:00,31 ,4.554492,165.3183,74.91411,30.59724
sgpcmbeC1.c1,1998,0718:30:00,31 ,2.469083,91.53139, 51.2834,16.32977
sgpcmbeC1.c1,1998,0719:30:00,31 ,5.521636, 31.1912,19.60306,  6.8579
sgpcmbeC1.c1,1998,0720:30:00,31 ,       0, 1.41106,0.045518,0.253434
sgpcmbeC1.c1,1998,0721:30:00,31 ,       0,1.218741,0.039314,0.218892
sgpcmbeC1.c1,1998,0722:30:00,31 ,       0,       0,       0,       0
sgpcmbeC1.c1,1998,0723:30:00,31 ,       0,0.835395,0.026948,0.150041