datastream, year, month, tod,n, min, max, mean, std
sgpcmbeC1.c1,2004,05 0:30:00,30 ,       0,       0,       0,       0
sgpcmbeC1.c1,2004,05 1:30:00,29 ,       0,       0,       0,       0
sgpcmbeC1.c1,2004,05 2:30:00,28 ,       0,1.259289,0.044975,0.237983
sgpcmbeC1.c1,2004,05 3:30:00,28 ,       0,1.225512,0.043768,  0.2316
sgpcmbeC1.c1,2004,05 4:30:00,28 ,       0,       0,       0,       0
sgpcmbeC1.c1,2004,05 5:30:00,31 ,       0,33.76529,12.68006,8.063069
sgpcmbeC1.c1,2004,05 6:30:00,31 , 1.95942, 74.8662,44.55537,18.53695
sgpcmbeC1.c1,2004,05 7:30:00,31 ,6.091016,125.9253,57.31039,25.04789
sgpcmbeC1.c1,2004,05 8:30:00,31 ,16.88344,194.8262,76.41488,39.33193
sgpcmbeC1.c1,2004,05 9:30:00,31 ,14.41725,213.2896,72.18611, 39.2643
sgpcmbeC1.c1,2004,0510:30:00,31 ,30.72367,239.0154,106.6277,77.78528
sgpcmbeC1.c1,2004,0511:30:00,31 ,15.78698,276.0491,114.7412,100.3731
sgpcmbeC1.c1,2004,0512:30:00,31 ,3.096965,294.1476,109.1843,114.4588
sgpcmbeC1.c1,2004,0513:30:00,31 ,7.538817,310.9093,100.5898,95.98712
sgpcmbeC1.c1,2004,0514:30:00,31 ,6.111647,263.5873,98.34468, 87.2805
sgpcmbeC1.c1,2004,0515:30:00,31 ,7.417283, 221.424,90.61559,67.29315
sgpcmbeC1.c1,2004,0516:30:00,31 ,9.782158,181.0698,88.57641,42.37281
sgpcmbeC1.c1,2004,0517:30:00,31 ,15.80651,197.3141,73.79794,32.13393
sgpcmbeC1.c1,2004,0518:30:00,31 ,6.977781, 77.8962,51.28149,14.91294
sgpcmbeC1.c1,2004,0519:30:00,31 , 1.16367,23.44829,11.60029,6.149626
sgpcmbeC1.c1,2004,0520:30:00,31 ,       0,       0,       0,       0
sgpcmbeC1.c1,2004,0521:30:00,31 ,       0,0.926691,0.029893,0.166439
sgpcmbeC1.c1,2004,0522:30:00,30 ,       0,1.291035,0.061387,0.253041
sgpcmbeC1.c1,2004,0523:30:00,31 ,       0,0.861611,0.027794, 0.15475