datastream, year, month, tod,n, min, max, mean, std
sgpcmbeC1.c1,2002,04 0:30:00,30 ,       0,       0,       0,       0
sgpcmbeC1.c1,2002,04 1:30:00,28 ,       0,       0,       0,       0
sgpcmbeC1.c1,2002,04 2:30:00,28 ,       0,       0,       0,       0
sgpcmbeC1.c1,2002,04 3:30:00,28 ,       0,       0,       0,       0
sgpcmbeC1.c1,2002,04 4:30:00,29 ,       0,       0,       0,       0
sgpcmbeC1.c1,2002,04 5:30:00,30 ,       0, 1.14872,0.103531,0.275053
sgpcmbeC1.c1,2002,04 6:30:00,30 ,       0,28.70112,8.945564,8.634908
sgpcmbeC1.c1,2002,04 7:30:00,30 ,1.625448,69.34863,30.29232,21.52482
sgpcmbeC1.c1,2002,04 8:30:00,30 ,1.610595,101.8876,54.84249,36.26343
sgpcmbeC1.c1,2002,04 9:30:00,30 ,2.202552,127.6248,68.34581,46.47287
sgpcmbeC1.c1,2002,0410:30:00,30 ,3.564038,149.7297,84.79089,53.21065
sgpcmbeC1.c1,2002,0411:30:00,30 ,11.90849,161.8476,98.12493,54.01201
sgpcmbeC1.c1,2002,0412:30:00,30 , 11.4274,165.8595,105.6632,54.52667
sgpcmbeC1.c1,2002,0413:30:00,30 ,10.06239,161.8526,103.4855,51.22831
sgpcmbeC1.c1,2002,0414:30:00,30 , 4.18513, 149.379,96.51573,49.67035
sgpcmbeC1.c1,2002,0415:30:00,30 , 10.1976,127.7038,85.69924,40.59586
sgpcmbeC1.c1,2002,0416:30:00,30 ,3.716491,100.0936,64.37596,33.78688
sgpcmbeC1.c1,2002,0417:30:00,30 ,1.970883,62.63023,36.39759,20.51399
sgpcmbeC1.c1,2002,0418:30:00,30 ,       0,26.59225,12.40517,7.331539
sgpcmbeC1.c1,2002,0419:30:00,30 ,       0,0.375287,  0.0422,0.104059
sgpcmbeC1.c1,2002,0420:30:00,30 ,       0,       0,       0,       0
sgpcmbeC1.c1,2002,0421:30:00,30 ,       0,       0,       0,       0
sgpcmbeC1.c1,2002,0422:30:00,29 ,       0,       0,       0,       0
sgpcmbeC1.c1,2002,0423:30:00,29 ,       0,       0,       0,       0