datastream, year, month, tod,n, min, max, mean, std
sgpcmbeC1.c1,2007,04 0:30:00,24 ,       0,       0,       0,       0
sgpcmbeC1.c1,2007,04 1:30:00,22 ,       0,       0,       0,       0
sgpcmbeC1.c1,2007,04 2:30:00,24 ,       0,       0,       0,       0
sgpcmbeC1.c1,2007,04 3:30:00,23 ,       0,       0,       0,       0
sgpcmbeC1.c1,2007,04 4:30:00,25 ,       0,       0,       0,       0
sgpcmbeC1.c1,2007,04 5:30:00,28 ,       0,7.149678,1.791497,2.381417
sgpcmbeC1.c1,2007,04 6:30:00,30 ,       0,34.09242,  16.228,7.768482
sgpcmbeC1.c1,2007,04 7:30:00,30 ,1.990778,54.93551,20.96237,14.00329
sgpcmbeC1.c1,2007,04 8:30:00,30 ,1.565021,81.67709,24.54374,22.71397
sgpcmbeC1.c1,2007,04 9:30:00,30 ,0.716243,103.1023, 26.9963,27.41929
sgpcmbeC1.c1,2007,0410:30:00,30 ,1.302997,113.0284,36.79224,37.33545
sgpcmbeC1.c1,2007,0411:30:00,30 ,1.135604, 167.761, 45.2606,44.40645
sgpcmbeC1.c1,2007,0412:30:00,30 ,1.032167,96.21268,33.84154,33.17024
sgpcmbeC1.c1,2007,0413:30:00,30 ,1.103575,140.3791,41.72003,40.07923
sgpcmbeC1.c1,2007,0414:30:00,30 ,0.521547,188.6647, 42.5122,44.10755
sgpcmbeC1.c1,2007,0415:30:00,30 ,1.132706,88.50428,24.75406,24.91342
sgpcmbeC1.c1,2007,0416:30:00,30 ,2.994949,98.21996,28.52608,28.65475
sgpcmbeC1.c1,2007,0417:30:00,30 ,1.643128,43.42388,14.87061,11.24691
sgpcmbeC1.c1,2007,0418:30:00,30 ,4.143256,32.76701,17.18874,8.339989
sgpcmbeC1.c1,2007,0419:30:00,28 ,       0,8.372297,1.606002,2.014776
sgpcmbeC1.c1,2007,0420:30:00,27 ,       0,       0,       0,       0
sgpcmbeC1.c1,2007,0421:30:00,25 ,       0,       0,       0,       0
sgpcmbeC1.c1,2007,0422:30:00,26 ,       0,       0,       0,       0
sgpcmbeC1.c1,2007,0423:30:00,23 ,       0,       0,       0,       0