datastream, year, month, tod,n, min, max, mean, std
sgpcmbeC1.c1,2006,01 0:30:00,29 ,       0,0.413257,0.030171,0.087112
sgpcmbeC1.c1,2006,01 1:30:00,27 ,       0,0.013668,0.000747,0.002869
sgpcmbeC1.c1,2006,01 2:30:00,26 ,       0,0.193046,0.008429,0.037992
sgpcmbeC1.c1,2006,01 3:30:00,26 ,       0,0.145692,0.009843,0.031661
sgpcmbeC1.c1,2006,01 4:30:00,28 ,       0,0.321792,0.015581,0.061787
sgpcmbeC1.c1,2006,01 5:30:00,29 ,       0,0.091803,0.010384,0.026137
sgpcmbeC1.c1,2006,01 6:30:00,27 ,       0, 0.11736,0.006447,0.023321
sgpcmbeC1.c1,2006,01 7:30:00,31 ,0.017639,6.258631,1.879356,1.625154
sgpcmbeC1.c1,2006,01 8:30:00,31 ,4.404706,83.68987,32.37666,16.59641
sgpcmbeC1.c1,2006,01 9:30:00,31 ,10.35153,218.7122,78.84809,45.33941
sgpcmbeC1.c1,2006,0110:30:00,31 ,20.70635, 342.469,  118.52,68.83588
sgpcmbeC1.c1,2006,0111:30:00,31 , 33.9902, 436.491,147.2311,87.53365
sgpcmbeC1.c1,2006,0112:30:00,31 ,23.85453,468.5042,158.2405,93.51519
sgpcmbeC1.c1,2006,0113:30:00,31 ,33.23238,448.5869, 153.482,88.73152
sgpcmbeC1.c1,2006,0114:30:00,31 , 23.5186,335.8998,126.5798,65.41268
sgpcmbeC1.c1,2006,0115:30:00,31 ,16.59179, 233.448,91.74059,45.95056
sgpcmbeC1.c1,2006,0116:30:00,31 ,8.187829,107.0712,47.05992,22.16796
sgpcmbeC1.c1,2006,0117:30:00,31 ,0.398525,19.52757,7.882658,5.405834
sgpcmbeC1.c1,2006,0118:30:00,18 ,       0,       0,       0,       0
sgpcmbeC1.c1,2006,0119:30:00,23 ,       0,0.061038,0.002654,0.012727
sgpcmbeC1.c1,2006,0120:30:00,25 ,       0,0.061178,0.002447,0.012236
sgpcmbeC1.c1,2006,0121:30:00,26 ,       0,0.403026,0.024184,0.081179
sgpcmbeC1.c1,2006,0122:30:00,25 ,       0,0.059809,0.002392,0.011962
sgpcmbeC1.c1,2006,0123:30:00,23 ,       0,       0,       0,       0