datastream, year, month, tod,n, min, max, mean, std
sgpcmbeC1.c1,2004,01 0:30:00,30 ,       0,0.760138,0.025338,0.138782
sgpcmbeC1.c1,2004,01 1:30:00,28 ,       0,0.667686,0.023846,0.126181
sgpcmbeC1.c1,2004,01 2:30:00,28 ,       0,1.204583,0.062501,0.246392
sgpcmbeC1.c1,2004,01 3:30:00,25 ,       0,0.546792,0.021872,0.109358
sgpcmbeC1.c1,2004,01 4:30:00,25 ,       0,       0,       0,       0
sgpcmbeC1.c1,2004,01 5:30:00,29 ,       0,       0,       0,       0
sgpcmbeC1.c1,2004,01 6:30:00,30 ,       0,0.850535,0.041295,0.168466
sgpcmbeC1.c1,2004,01 7:30:00,31 ,       0,13.54409,4.596342,3.637298
sgpcmbeC1.c1,2004,01 8:30:00,31 ,3.527055,91.44216, 33.3185,22.44944
sgpcmbeC1.c1,2004,01 9:30:00,31 ,5.986554,113.8663, 39.1149,24.37144
sgpcmbeC1.c1,2004,0110:30:00,31 ,5.368631,127.0061,39.65748,24.81356
sgpcmbeC1.c1,2004,0111:30:00,31 ,4.617445,159.1709,44.26073,37.08472
sgpcmbeC1.c1,2004,0112:30:00,31 ,2.515157,122.1819,36.38647,38.53999
sgpcmbeC1.c1,2004,0113:30:00,31 ,5.490362,137.8233,37.49155,32.58555
sgpcmbeC1.c1,2004,0114:30:00,31 ,6.262359,  112.93, 42.9176,25.85003
sgpcmbeC1.c1,2004,0115:30:00,31 ,5.274801,82.64806,43.64315, 18.8256
sgpcmbeC1.c1,2004,0116:30:00,31 , 6.65789,70.68757,40.15283,18.07362
sgpcmbeC1.c1,2004,0117:30:00,31 , 2.24613,40.42562,15.82433,11.10552
sgpcmbeC1.c1,2004,0118:30:00,31 ,       0,1.684592,0.067573,0.309006
sgpcmbeC1.c1,2004,0119:30:00,31 ,       0,0.970035,0.085373, 0.24366
sgpcmbeC1.c1,2004,0120:30:00,30 ,       0,0.973331,0.032444,0.177705
sgpcmbeC1.c1,2004,0121:30:00,29 ,       0,0.957399,0.067654,0.214873
sgpcmbeC1.c1,2004,0122:30:00,29 ,       0,       0,       0,       0
sgpcmbeC1.c1,2004,0123:30:00,29 ,       0,       0,       0,       0