datastream, year, month, tod,n, min, max, mean, std
sgpcmbeC1.c1,1999,04 0:30:00,19 ,       0,0.388188,0.020431,0.089056
sgpcmbeC1.c1,1999,04 1:30:00,19 ,       0,1.543087,0.081215,0.354008
sgpcmbeC1.c1,1999,04 2:30:00,19 ,       0,1.826113,0.153775,0.476432
sgpcmbeC1.c1,1999,04 3:30:00,19 ,       0,       0,       0,       0
sgpcmbeC1.c1,1999,04 4:30:00,19 ,       0,       0,       0,       0
sgpcmbeC1.c1,1999,04 5:30:00,19 ,       0,2.965024,0.624542,0.867965
sgpcmbeC1.c1,1999,04 6:30:00,19 ,2.838905,51.06054,31.08146,15.90294
sgpcmbeC1.c1,1999,04 7:30:00,19 ,8.028696,88.62257,48.64675,24.47458
sgpcmbeC1.c1,1999,04 8:30:00,18 , 6.30766, 106.674,58.52538,23.63027
sgpcmbeC1.c1,1999,04 9:30:00,18 ,7.005605,121.1152,67.47089,31.51751
sgpcmbeC1.c1,1999,0410:30:00,18 ,24.93373,216.2356,77.49337, 67.7584
sgpcmbeC1.c1,1999,0411:30:00,18 ,10.01074, 337.844,83.70084, 97.9047
sgpcmbeC1.c1,1999,0412:30:00,18 ,2.944293,384.8275, 92.4864,110.3626
sgpcmbeC1.c1,1999,0413:30:00,18 ,18.00756,364.1898,83.19901,97.66329
sgpcmbeC1.c1,1999,0414:30:00,18 ,8.287351,316.0809,100.3534, 84.8733
sgpcmbeC1.c1,1999,0415:30:00,18 ,7.939503,252.0652,103.7633,77.63229
sgpcmbeC1.c1,1999,0416:30:00,18 ,4.907551, 139.757,79.34166,38.56077
sgpcmbeC1.c1,1999,0417:30:00,18 ,2.856967,83.85499,53.35356,23.00084
sgpcmbeC1.c1,1999,0418:30:00,18 ,3.447399,57.07655,34.39255,15.86864
sgpcmbeC1.c1,1999,0419:30:00,18 ,       0, 2.56838, 0.93886,0.991518
sgpcmbeC1.c1,1999,0420:30:00,18 ,       0,       0,       0,       0
sgpcmbeC1.c1,1999,0421:30:00,18 ,       0, 0.96146,0.053414,0.226618
sgpcmbeC1.c1,1999,0422:30:00,18 ,       0,       0,       0,       0
sgpcmbeC1.c1,1999,0423:30:00,18 ,       0,       0,       0,       0