datastream, year, month, tod,n, min, max, mean, std
sgpcmbeC1.c1,2001,06 0:30:00,29 ,       0,0.225995,0.007793,0.041966
sgpcmbeC1.c1,2001,06 1:30:00,28 ,       0,       0,       0,       0
sgpcmbeC1.c1,2001,06 2:30:00,27 ,       0,       0,       0,       0
sgpcmbeC1.c1,2001,06 3:30:00,28 ,       0,       0,       0,       0
sgpcmbeC1.c1,2001,06 4:30:00,29 ,       0,0.005023,0.000173,0.000933
sgpcmbeC1.c1,2001,06 5:30:00,30 ,0.068458,10.02452,5.488269,3.024691
sgpcmbeC1.c1,2001,06 6:30:00,30 ,3.066088,53.87352,34.27918,17.56033
sgpcmbeC1.c1,2001,06 7:30:00,30 ,14.30702,99.97609,70.53091,30.11178
sgpcmbeC1.c1,2001,06 8:30:00,30 , 20.9028,139.3465,104.0941,35.57351
sgpcmbeC1.c1,2001,06 9:30:00,30 ,13.49989,161.7619,125.9544,45.21809
sgpcmbeC1.c1,2001,0610:30:00,30 ,1.263421,180.8755,146.9434,42.44217
sgpcmbeC1.c1,2001,0611:30:00,30 ,   18.89, 191.251,157.0145,34.76231
sgpcmbeC1.c1,2001,0612:30:00,30 ,80.59084,198.1915,166.1912,28.37368
sgpcmbeC1.c1,2001,0613:30:00,30 ,46.99098,188.8283,161.6442,30.56168
sgpcmbeC1.c1,2001,0614:30:00,30 ,20.92288,178.9472,151.3773,34.92424
sgpcmbeC1.c1,2001,0615:30:00,30 ,44.53117,161.5266,138.8111,  25.896
sgpcmbeC1.c1,2001,0616:30:00,30 ,31.24014,134.3667,110.8485,28.91664
sgpcmbeC1.c1,2001,0617:30:00,30 ,26.58461, 101.842,  81.858,18.16191
sgpcmbeC1.c1,2001,0618:30:00,30 ,4.493774,55.95341,39.24459,15.83741
sgpcmbeC1.c1,2001,0619:30:00,30 ,       0,12.00994,6.749213,4.015811
sgpcmbeC1.c1,2001,0620:30:00,29 ,       0,       0,       0,       0
sgpcmbeC1.c1,2001,0621:30:00,30 ,       0, 0.09313,0.003104,0.017003
sgpcmbeC1.c1,2001,0622:30:00,29 ,       0,0.075967, 0.00262,0.014107
sgpcmbeC1.c1,2001,0623:30:00,29 ,       0,       0,       0,       0