datastream, year, month, tod,n, min, max, mean, std
sgpcmbeC1.c1,2004,06 0:30:00,29 ,       0,0.009711,0.000335,0.001803
sgpcmbeC1.c1,2004,06 1:30:00,29 ,       0,0.002583,0.000089, 0.00048
sgpcmbeC1.c1,2004,06 2:30:00,30 ,       0,       0,       0,       0
sgpcmbeC1.c1,2004,06 3:30:00,30 ,       0,       0,       0,       0
sgpcmbeC1.c1,2004,06 4:30:00,30 ,       0,0.014238,0.000643,0.002728
sgpcmbeC1.c1,2004,06 5:30:00,30 ,0.411147,11.54694,5.190011,3.721023
sgpcmbeC1.c1,2004,06 6:30:00,30 ,       0,55.78684,26.92442,18.76704
sgpcmbeC1.c1,2004,06 7:30:00,29 ,3.988555,101.0834,52.24008,32.16602
sgpcmbeC1.c1,2004,06 8:30:00,28 ,7.235033,136.9025,81.91373,45.71552
sgpcmbeC1.c1,2004,06 9:30:00,29 ,2.876215,162.4804,97.74816, 58.9733
sgpcmbeC1.c1,2004,0610:30:00,29 , 14.2958,177.6339,111.9975,53.02912
sgpcmbeC1.c1,2004,0611:30:00,29 , 6.72699,184.5498,120.6974,57.09978
sgpcmbeC1.c1,2004,0612:30:00,29 ,1.592766,183.6392,135.2201,52.33559
sgpcmbeC1.c1,2004,0613:30:00,29 ,7.096301,177.0215,135.7052,39.45398
sgpcmbeC1.c1,2004,0614:30:00,29 ,31.70638,167.6633,134.5981,35.73209
sgpcmbeC1.c1,2004,0615:30:00,29 ,22.94335,159.7796,124.8605,32.20154
sgpcmbeC1.c1,2004,0616:30:00,29 ,12.28619,129.3976,98.70716,29.72104
sgpcmbeC1.c1,2004,0617:30:00,29 ,14.55057,93.17672,  70.726,20.68282
sgpcmbeC1.c1,2004,0618:30:00,29 ,11.95343,52.72584,35.99945,13.45154
sgpcmbeC1.c1,2004,0619:30:00,29 ,       0,19.67081,8.044259,5.238985
sgpcmbeC1.c1,2004,0620:30:00,29 ,       0,       0,       0,       0
sgpcmbeC1.c1,2004,0621:30:00,28 ,       0,       0,       0,       0
sgpcmbeC1.c1,2004,0622:30:00,27 ,       0, 0.10411,0.003856,0.020036
sgpcmbeC1.c1,2004,0623:30:00,27 ,       0,0.324037,0.012001,0.062361