datastream, year, month, tod,n, min, max, mean, std
sgpcmbeC1.c1,2001,07 0:30:00,30 ,       0, 2.34979,0.134298, 0.51862
sgpcmbeC1.c1,2001,07 1:30:00,30 ,       0,2.942418,0.125961,0.553404
sgpcmbeC1.c1,2001,07 2:30:00,28 ,       0,       0,       0,       0
sgpcmbeC1.c1,2001,07 3:30:00,28 ,       0,       0,       0,       0
sgpcmbeC1.c1,2001,07 4:30:00,28 ,       0,       0,       0,       0
sgpcmbeC1.c1,2001,07 5:30:00,31 ,0.000666,4.934593,1.566619,1.638208
sgpcmbeC1.c1,2001,07 6:30:00,31 ,0.019695,102.2875,50.00555,33.45501
sgpcmbeC1.c1,2001,07 7:30:00,31 ,0.088287,276.4048,  164.74,83.03527
sgpcmbeC1.c1,2001,07 8:30:00,31 ,0.537888,454.5425,289.8027,159.7673
sgpcmbeC1.c1,2001,07 9:30:00,31 ,0.639305,616.5172,436.8865,205.6216
sgpcmbeC1.c1,2001,0710:30:00,31 ,46.83368,751.2873, 586.374,195.3603
sgpcmbeC1.c1,2001,0711:30:00,31 ,238.5636,846.7752, 678.226,162.5449
sgpcmbeC1.c1,2001,0712:30:00,30 ,68.01402,879.2066, 625.053, 254.478
sgpcmbeC1.c1,2001,0713:30:00,31 ,0.583008,833.8293,592.7692,254.1344
sgpcmbeC1.c1,2001,0714:30:00,31 ,2.899567, 748.592,522.2143,245.4234
sgpcmbeC1.c1,2001,0715:30:00,31 ,3.619049,644.4479,425.9382,220.3522
sgpcmbeC1.c1,2001,0716:30:00,31 ,10.14581, 475.782,332.6321,144.2857
sgpcmbeC1.c1,2001,0717:30:00,31 ,11.27662,306.5941,211.1072,83.91157
sgpcmbeC1.c1,2001,0718:30:00,31 ,       0,135.5814,82.10859,36.43577
sgpcmbeC1.c1,2001,0719:30:00,31 ,       0,16.39174,6.553665,4.583163
sgpcmbeC1.c1,2001,0720:30:00,29 ,       0,3.396969,0.177224,0.698595
sgpcmbeC1.c1,2001,0721:30:00,27 ,       0,       0,       0,       0
sgpcmbeC1.c1,2001,0722:30:00,27 ,       0,       0,       0,       0
sgpcmbeC1.c1,2001,0723:30:00,27 ,       0,       0,       0,       0