datastream, year, month, tod,n, min, max, mean, std
sgpcmbeC1.c1,2004,07 0:30:00,30 ,       0,0.848778,0.028293,0.154965
sgpcmbeC1.c1,2004,07 1:30:00,30 ,       0,1.463647,0.083978,0.295093
sgpcmbeC1.c1,2004,07 2:30:00,30 ,       0,1.599944,0.093861,0.360741
sgpcmbeC1.c1,2004,07 3:30:00,30 ,       0,1.176105,0.039204,0.214726
sgpcmbeC1.c1,2004,07 4:30:00,30 ,       0,       0,       0,       0
sgpcmbeC1.c1,2004,07 5:30:00,30 ,1.456826, 23.8616,10.94237,5.711289
sgpcmbeC1.c1,2004,07 6:30:00,30 ,4.808158,98.09045,43.64991,22.05426
sgpcmbeC1.c1,2004,07 7:30:00,30 ,3.871132,94.00182,52.24246,22.88557
sgpcmbeC1.c1,2004,07 8:30:00,30 ,18.10027,183.7075,74.46107,39.41145
sgpcmbeC1.c1,2004,07 9:30:00,30 ,7.893802,255.2392,90.96959, 65.0287
sgpcmbeC1.c1,2004,0710:30:00,30 ,8.109894,283.6796, 89.8565, 82.3189
sgpcmbeC1.c1,2004,0711:30:00,31 , 16.7758,312.2762,93.30393,92.05147
sgpcmbeC1.c1,2004,0712:30:00,31 ,3.423855,325.6861,106.6123,101.5791
sgpcmbeC1.c1,2004,0713:30:00,31 ,8.635519,330.4134,127.0346,116.4452
sgpcmbeC1.c1,2004,0714:30:00,31 ,21.36986, 361.608,144.6928,106.4312
sgpcmbeC1.c1,2004,0715:30:00,31 ,13.56335,282.2335,107.1897,80.00492
sgpcmbeC1.c1,2004,0716:30:00,31 ,7.605632,199.4843,86.22519,49.78912
sgpcmbeC1.c1,2004,0717:30:00,31 ,4.284773,137.3472,71.08166,31.37689
sgpcmbeC1.c1,2004,0718:30:00,31 ,4.532548,90.22525,50.15578,23.13304
sgpcmbeC1.c1,2004,0719:30:00,31 ,2.121184,34.75105,21.27164,8.797103
sgpcmbeC1.c1,2004,0720:30:00,31 ,       0,1.169466,0.095686,0.300021
sgpcmbeC1.c1,2004,0721:30:00,31 ,       0,0.388209,0.012523,0.069724
sgpcmbeC1.c1,2004,0722:30:00,31 ,       0,1.102912,0.035578,0.198089
sgpcmbeC1.c1,2004,0723:30:00,31 ,       0,0.860872, 0.02777,0.154617