datastream, year, month, tod,n, min, max, mean, std
sgpcmbeC1.c1,2007,01 0:30:00,21 ,       0,       0,       0,       0
sgpcmbeC1.c1,2007,01 1:30:00,20 ,       0,       0,       0,       0
sgpcmbeC1.c1,2007,01 2:30:00,17 ,       0,       0,       0,       0
sgpcmbeC1.c1,2007,01 3:30:00,17 ,       0,       0,       0,       0
sgpcmbeC1.c1,2007,01 4:30:00,13 ,       0,       0,       0,       0
sgpcmbeC1.c1,2007,01 5:30:00,15 ,       0,       0,       0,       0
sgpcmbeC1.c1,2007,01 6:30:00,22 ,       0,       0,       0,       0
sgpcmbeC1.c1,2007,01 7:30:00,31 ,       0,9.745766,4.200561,2.524101
sgpcmbeC1.c1,2007,01 8:30:00,31 ,  3.9202,53.91074,16.09989,10.00129
sgpcmbeC1.c1,2007,01 9:30:00,31 ,2.555991,51.73534,15.80622,14.29077
sgpcmbeC1.c1,2007,0110:30:00,31 , 1.09032,39.83719,14.24368, 11.8672
sgpcmbeC1.c1,2007,0111:30:00,31 ,0.467569,100.6393,16.87004,20.10676
sgpcmbeC1.c1,2007,0112:30:00,31 , 0.35794,87.41829,18.69247,21.57657
sgpcmbeC1.c1,2007,0113:30:00,31 ,0.600388,83.19405,17.06673,17.08966
sgpcmbeC1.c1,2007,0114:30:00,31 ,1.236847,55.03598,15.10945,14.99113
sgpcmbeC1.c1,2007,0115:30:00,31 ,2.550132,44.52365,13.14727, 11.6074
sgpcmbeC1.c1,2007,0116:30:00,31 , 1.56926,46.46662,14.16022,10.03039
sgpcmbeC1.c1,2007,0117:30:00,31 ,       0,21.18534,9.973408, 4.68117
sgpcmbeC1.c1,2007,0118:30:00,27 ,       0,       0,       0,       0
sgpcmbeC1.c1,2007,0119:30:00,25 ,       0,       0,       0,       0
sgpcmbeC1.c1,2007,0120:30:00,20 ,       0,       0,       0,       0
sgpcmbeC1.c1,2007,0121:30:00,22 ,       0,       0,       0,       0
sgpcmbeC1.c1,2007,0122:30:00,19 ,       0,       0,       0,       0
sgpcmbeC1.c1,2007,0123:30:00,20 ,       0,       0,       0,       0