datastream, year, month, tod,n, min, max, mean, std
sgpcmbeC1.c1,2003,05 0:30:00,31 ,       0,0.760728, 0.02454,0.136631
sgpcmbeC1.c1,2003,05 1:30:00,31 ,       0,       0,       0,       0
sgpcmbeC1.c1,2003,05 2:30:00,31 ,       0,       0,       0,       0
sgpcmbeC1.c1,2003,05 3:30:00,30 ,       0,       0,       0,       0
sgpcmbeC1.c1,2003,05 4:30:00,31 ,       0,       0,       0,       0
sgpcmbeC1.c1,2003,05 5:30:00,31 ,0.587317,25.57683,12.10137,7.457097
sgpcmbeC1.c1,2003,05 6:30:00,31 ,2.061651,65.22487,37.39614,20.67017
sgpcmbeC1.c1,2003,05 7:30:00,31 ,0.938307,119.8807,53.07634,28.23631
sgpcmbeC1.c1,2003,05 8:30:00,31 ,12.51678,201.4506,67.03468,40.19319
sgpcmbeC1.c1,2003,05 9:30:00,31 ,16.90859,251.2035,93.20546, 66.8437
sgpcmbeC1.c1,2003,0510:30:00,31 ,31.09103,290.1363,94.91574,70.25739
sgpcmbeC1.c1,2003,0511:30:00,31 ,15.06342,326.4518,94.69288,79.16279
sgpcmbeC1.c1,2003,0512:30:00,31 , 2.96199,263.0308,78.71381,68.89293
sgpcmbeC1.c1,2003,0513:30:00,31 ,17.27944,365.3864,112.1631,110.1106
sgpcmbeC1.c1,2003,0514:30:00,31 ,27.59078,400.1568,114.4284,92.30568
sgpcmbeC1.c1,2003,0515:30:00,31 ,23.44782,257.1941, 99.0705, 59.8782
sgpcmbeC1.c1,2003,0516:30:00,31 ,15.56293,213.9771,83.75221,48.17401
sgpcmbeC1.c1,2003,0517:30:00,31 ,7.951105,124.5701,69.17503,24.48341
sgpcmbeC1.c1,2003,0518:30:00,31 , 3.08844,70.56811,44.98089,17.06672
sgpcmbeC1.c1,2003,0519:30:00,31 ,1.239801, 21.5293,12.53204,5.655441
sgpcmbeC1.c1,2003,0520:30:00,31 ,       0,       0,       0,       0
sgpcmbeC1.c1,2003,0521:30:00,31 ,       0,       0,       0,       0
sgpcmbeC1.c1,2003,0522:30:00,31 ,       0, 1.52185,0.049092,0.273332
sgpcmbeC1.c1,2003,0523:30:00,31 ,       0,1.519387,0.049012, 0.27289