datastream, year, month, tod,n, min, max, mean, std
sgpcmbeC1.c1,2003,01 0:30:00,25 ,       0,0.169785,0.006791,0.033957
sgpcmbeC1.c1,2003,01 1:30:00,26 ,       0,0.082928, 0.00319,0.016264
sgpcmbeC1.c1,2003,01 2:30:00,21 ,       0,       0,       0,       0
sgpcmbeC1.c1,2003,01 3:30:00,27 ,       0,       0,       0,       0
sgpcmbeC1.c1,2003,01 4:30:00,26 ,       0,       0,       0,       0
sgpcmbeC1.c1,2003,01 5:30:00,30 ,       0,       0,       0,       0
sgpcmbeC1.c1,2003,01 6:30:00,31 ,       0,       0,       0,       0
sgpcmbeC1.c1,2003,01 7:30:00,31 ,       0,  10.719,4.321654,2.703486
sgpcmbeC1.c1,2003,01 8:30:00,31 ,10.51782,147.3961,88.94485,35.42384
sgpcmbeC1.c1,2003,01 9:30:00,31 ,32.59289,336.5799,222.0909,91.37449
sgpcmbeC1.c1,2003,0110:30:00,31 , 63.2845,494.1236,347.0792,137.0001
sgpcmbeC1.c1,2003,0111:30:00,31 ,86.18649,602.5099,433.5109,152.1909
sgpcmbeC1.c1,2003,0112:30:00,31 , 122.032,651.1356,459.0746, 157.784
sgpcmbeC1.c1,2003,0113:30:00,31 ,105.4564,632.9117,463.3577, 148.162
sgpcmbeC1.c1,2003,0114:30:00,31 ,82.78255,551.9913,393.6311,132.6053
sgpcmbeC1.c1,2003,0115:30:00,31 ,54.95129,394.7999,277.4824,108.9031
sgpcmbeC1.c1,2003,0116:30:00,31 , 27.5512,226.6722,135.8314,58.21614
sgpcmbeC1.c1,2003,0117:30:00,31 ,1.141674,50.35615,17.94489,12.45924
sgpcmbeC1.c1,2003,0118:30:00,31 ,       0,1.916426,0.075736,0.348306
sgpcmbeC1.c1,2003,0119:30:00,30 ,       0,0.228116,0.007604,0.041648
sgpcmbeC1.c1,2003,0120:30:00,27 ,       0,0.050537,0.001872,0.009726
sgpcmbeC1.c1,2003,0121:30:00,27 ,       0,       0,       0,       0
sgpcmbeC1.c1,2003,0122:30:00,24 ,       0,0.500585,0.020858,0.102182
sgpcmbeC1.c1,2003,0123:30:00,24 ,       0,       0,       0,       0