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 ,       0,1.546644,0.225588,0.436092
sgpcmbeC1.c1,2007,04 6:30:00,30 ,       0,35.22745,11.78365,9.654748
sgpcmbeC1.c1,2007,04 7:30:00,30 ,       0,84.06303, 42.2944,25.31647
sgpcmbeC1.c1,2007,04 8:30:00,30 ,2.861692,122.5338,75.12024,  36.024
sgpcmbeC1.c1,2007,04 9:30:00,29 ,21.85617, 149.013,100.1118,41.61406
sgpcmbeC1.c1,2007,0410:30:00,30 ,3.711084,173.6965,115.4082,49.54878
sgpcmbeC1.c1,2007,0411:30:00,30 ,5.663635,180.4345,127.6218,54.86093
sgpcmbeC1.c1,2007,0412:30:00,30 ,2.810125,183.4675,124.0963,57.82325
sgpcmbeC1.c1,2007,0413:30:00,30 , 6.51232,177.8567,121.2886,53.28246
sgpcmbeC1.c1,2007,0414:30:00,30 ,5.716206,164.9078,113.3514,51.26159
sgpcmbeC1.c1,2007,0415:30:00,30 ,2.646451, 143.472, 100.104,46.61587
sgpcmbeC1.c1,2007,0416:30:00,30 ,2.432794,116.2783,77.44008,36.39331
sgpcmbeC1.c1,2007,0417:30:00,30 ,0.798181,75.46011,45.86118,24.44341
sgpcmbeC1.c1,2007,0418:30:00,30 , 0.30147,28.76068, 14.1021, 8.44584
sgpcmbeC1.c1,2007,0419:30:00,28 ,       0,1.523876,0.116819,0.298672
sgpcmbeC1.c1,2007,0420:30:00,27 ,       0,       0,       0,       0
sgpcmbeC1.c1,2007,0421:30:00,26 ,       0,       0,       0,       0
sgpcmbeC1.c1,2007,0422:30:00,26 ,       0,       0,       0,       0
sgpcmbeC1.c1,2007,0423:30:00,24 ,       0,       0,       0,       0