datastream, year, month, tod,n, min, max, mean, std
sgpcmbeC1.c1,1997,04 0:30:00,30 ,       0, 0.70077,0.023359,0.127942
sgpcmbeC1.c1,1997,04 1:30:00,30 ,       0,       0,       0,       0
sgpcmbeC1.c1,1997,04 2:30:00,30 ,       0,       0,       0,       0
sgpcmbeC1.c1,1997,04 3:30:00,30 ,       0,       0,       0,       0
sgpcmbeC1.c1,1997,04 4:30:00,30 ,       0,0.405927,0.013531,0.074112
sgpcmbeC1.c1,1997,04 5:30:00,30 ,       0,9.210993, 1.70835,2.658514
sgpcmbeC1.c1,1997,04 6:30:00,30 ,1.247169,86.64362,29.73391,22.00762
sgpcmbeC1.c1,1997,04 7:30:00,30 ,3.212388,113.3712,47.97603,30.53407
sgpcmbeC1.c1,1997,04 8:30:00,30 ,5.327081,145.3924,64.26555,40.05776
sgpcmbeC1.c1,1997,04 9:30:00,30 ,10.90238,172.5747,68.40224,44.39738
sgpcmbeC1.c1,1997,0410:30:00,30 ,4.363819,165.1605,65.51021,  44.065
sgpcmbeC1.c1,1997,0411:30:00,30 ,12.01109,283.2809,84.75599,79.37466
sgpcmbeC1.c1,1997,0412:30:00,30 ,3.478871, 329.369,83.25632, 88.6209
sgpcmbeC1.c1,1997,0413:30:00,30 ,10.64851,337.1828,97.53354,86.98899
sgpcmbeC1.c1,1997,0414:30:00,30 ,10.19538,263.9772,96.91516, 70.8223
sgpcmbeC1.c1,1997,0415:30:00,30 ,14.91139,236.5117,80.10682,56.60535
sgpcmbeC1.c1,1997,0416:30:00,30 , 6.58353,169.0058,63.28315,45.15437
sgpcmbeC1.c1,1997,0417:30:00,30 ,7.533787,88.33529,45.68964,27.31504
sgpcmbeC1.c1,1997,0418:30:00,30 ,2.813247,64.68702,33.14648,20.75539
sgpcmbeC1.c1,1997,0419:30:00,30 ,       0,6.487013,1.666006,1.792808
sgpcmbeC1.c1,1997,0420:30:00,30 ,       0,0.910469,0.070175,0.222248
sgpcmbeC1.c1,1997,0421:30:00,30 ,       0,0.463497, 0.01545,0.084623
sgpcmbeC1.c1,1997,0422:30:00,30 ,       0,0.797927,0.026598,0.145681
sgpcmbeC1.c1,1997,0423:30:00,30 ,       0,0.779599,0.025987,0.142335