datastream, year, month, tod,n, min, max, mean, std
sgpcmbeC1.c1,2002,05 0:30:00,30 ,       0,       0,       0,       0
sgpcmbeC1.c1,2002,05 1:30:00,30 ,       0,       0,       0,       0
sgpcmbeC1.c1,2002,05 2:30:00,30 ,       0,       0,       0,       0
sgpcmbeC1.c1,2002,05 3:30:00,30 ,       0,       0,       0,       0
sgpcmbeC1.c1,2002,05 4:30:00,30 ,       0,       0,       0,       0
sgpcmbeC1.c1,2002,05 5:30:00,30 ,0.189115,23.16334,10.24258,6.514992
sgpcmbeC1.c1,2002,05 6:30:00,31 ,9.615444,121.1557,64.78385,23.92187
sgpcmbeC1.c1,2002,05 7:30:00,31 ,24.99151,219.4966,130.3873,48.42522
sgpcmbeC1.c1,2002,05 8:30:00,31 ,50.85584,285.7801,  187.78, 71.2718
sgpcmbeC1.c1,2002,05 9:30:00,31 ,70.69129,437.5103,261.4552,118.1968
sgpcmbeC1.c1,2002,0510:30:00,31 ,95.78312,460.0274, 277.818,121.3346
sgpcmbeC1.c1,2002,0511:30:00,31 ,88.29319,501.0627,253.9467,123.9992
sgpcmbeC1.c1,2002,0512:30:00,31 ,90.80654,626.5471,261.0904,149.7829
sgpcmbeC1.c1,2002,0513:30:00,31 ,15.74919, 541.631,228.5533,141.7084
sgpcmbeC1.c1,2002,0514:30:00,31 ,18.70427,  447.81,227.8772,126.8574
sgpcmbeC1.c1,2002,0515:30:00,31 , 18.7391,361.6129,190.3252, 92.0378
sgpcmbeC1.c1,2002,0516:30:00,31 ,54.65504,312.1209,165.0789,73.55054
sgpcmbeC1.c1,2002,0517:30:00,31 ,8.534444,233.2205,119.7333, 57.5811
sgpcmbeC1.c1,2002,0518:30:00,31 ,1.756375,95.71449,56.01242,23.11316
sgpcmbeC1.c1,2002,0519:30:00,31 ,       0,13.80769,6.465458,4.059289
sgpcmbeC1.c1,2002,0520:30:00,31 ,       0,       0,       0,       0
sgpcmbeC1.c1,2002,0521:30:00,31 ,       0,       0,       0,       0
sgpcmbeC1.c1,2002,0522:30:00,30 ,       0,       0,       0,       0
sgpcmbeC1.c1,2002,0523:30:00,30 ,       0,       0,       0,       0