datastream, year, month, tod,n, min, max, mean, std
sgpcmbeC1.c1,2003,07 0:30:00,31 ,       0,       0,       0,       0
sgpcmbeC1.c1,2003,07 1:30:00,31 ,       0,       0,       0,       0
sgpcmbeC1.c1,2003,07 2:30:00,31 ,       0,       0,       0,       0
sgpcmbeC1.c1,2003,07 3:30:00,31 ,       0,       0,       0,       0
sgpcmbeC1.c1,2003,07 4:30:00,31 ,       0,       0,       0,       0
sgpcmbeC1.c1,2003,07 5:30:00,31 ,       0,18.06436,10.55091,4.230842
sgpcmbeC1.c1,2003,07 6:30:00,31 ,5.337041,34.78478,18.11764,8.586363
sgpcmbeC1.c1,2003,07 7:30:00,31 ,3.374512,56.73489,  14.842,12.10692
sgpcmbeC1.c1,2003,07 8:30:00,31 ,2.671569,79.62695,20.02212,20.55357
sgpcmbeC1.c1,2003,07 9:30:00,31 ,1.247325, 67.8632,16.13607,19.41694
sgpcmbeC1.c1,2003,0710:30:00,31 ,0.715097,80.09592,21.85937,26.65083
sgpcmbeC1.c1,2003,0711:30:00,31 ,0.671912,116.5539,27.33138,33.97486
sgpcmbeC1.c1,2003,0712:30:00,31 ,0.737819,59.74503, 18.4329,17.47993
sgpcmbeC1.c1,2003,0713:30:00,31 ,0.924182,120.4474,29.91667,32.67134
sgpcmbeC1.c1,2003,0714:30:00,31 ,0.931074,113.1433,31.53314, 32.3108
sgpcmbeC1.c1,2003,0715:30:00,31 , 1.73292,99.83775,25.53734,25.76999
sgpcmbeC1.c1,2003,0716:30:00,31 ,1.522831,144.0037,26.03931,32.72388
sgpcmbeC1.c1,2003,0717:30:00,31 ,4.252348, 95.6404,18.95613,18.35686
sgpcmbeC1.c1,2003,0718:30:00,31 ,7.371136,45.78254,18.76586, 10.3405
sgpcmbeC1.c1,2003,0719:30:00,31 ,7.393529,26.54645,14.44087,4.064872
sgpcmbeC1.c1,2003,0720:30:00,31 ,       0,1.364378,0.044012, 0.24505
sgpcmbeC1.c1,2003,0721:30:00,31 ,       0,       0,       0,       0
sgpcmbeC1.c1,2003,0722:30:00,31 ,       0,       0,       0,       0
sgpcmbeC1.c1,2003,0723:30:00,31 ,       0,       0,       0,       0