datastream, year, month, tod,n, min, max, mean, std
sgpcmbeC1.c1,2006,08 0:30:00,29 ,       0,0.005552,0.000191,0.001031
sgpcmbeC1.c1,2006,08 1:30:00,28 ,       0,       0,       0,       0
sgpcmbeC1.c1,2006,08 2:30:00,29 ,       0,0.003094,0.000107,0.000574
sgpcmbeC1.c1,2006,08 3:30:00,31 ,       0,0.009007,0.000291,0.001618
sgpcmbeC1.c1,2006,08 4:30:00,31 ,       0,0.015945,0.000514,0.002864
sgpcmbeC1.c1,2006,08 5:30:00,31 ,       0,3.143291,0.305692,0.594151
sgpcmbeC1.c1,2006,08 6:30:00,31 ,2.383819,31.74029,15.10842,9.663815
sgpcmbeC1.c1,2006,08 7:30:00,31 ,4.469548,77.68871, 47.3143, 22.4941
sgpcmbeC1.c1,2006,08 8:30:00,31 ,4.849356,120.0022,78.58865,   33.37
sgpcmbeC1.c1,2006,08 9:30:00,31 ,40.23259,  151.86,103.1579,35.24522
sgpcmbeC1.c1,2006,0810:30:00,31 ,33.75125,173.4358,120.9696,38.14471
sgpcmbeC1.c1,2006,0811:30:00,31 ,40.32786,187.4227,133.5773, 42.5796
sgpcmbeC1.c1,2006,0812:30:00,31 ,49.90469, 189.921, 139.306,36.73916
sgpcmbeC1.c1,2006,0813:30:00,31 ,30.33942,179.7199,132.5734,36.21233
sgpcmbeC1.c1,2006,0814:30:00,31 , 42.2716, 169.986,121.1267, 34.8643
sgpcmbeC1.c1,2006,0815:30:00,31 ,3.421651,149.2586,103.3398,35.31342
sgpcmbeC1.c1,2006,0816:30:00,31 ,1.526666,119.4016,76.97086,30.13498
sgpcmbeC1.c1,2006,0817:30:00,31 , 1.37357,79.82317,49.84107,19.90393
sgpcmbeC1.c1,2006,0818:30:00,31 ,1.610476,36.13568,18.54412,10.06896
sgpcmbeC1.c1,2006,0819:30:00,31 ,       0,5.384065,0.670228,1.180451
sgpcmbeC1.c1,2006,0820:30:00,31 ,       0,0.004936,0.000159,0.000887
sgpcmbeC1.c1,2006,0821:30:00,30 ,       0,0.006179,0.000323,0.001278
sgpcmbeC1.c1,2006,0822:30:00,30 ,       0,       0,       0,       0
sgpcmbeC1.c1,2006,0823:30:00,31 ,       0,       0,       0,       0