datastream, year, month, tod,n, min, max, mean, std
sgpcmbeC1.c1,2002,12 0:30:00,22 ,       0,       0,       0,       0
sgpcmbeC1.c1,2002,12 1:30:00,26 ,       0,       0,       0,       0
sgpcmbeC1.c1,2002,12 2:30:00,25 ,       0,       0,       0,       0
sgpcmbeC1.c1,2002,12 3:30:00,23 ,       0,       0,       0,       0
sgpcmbeC1.c1,2002,12 4:30:00,29 ,       0,       0,       0,       0
sgpcmbeC1.c1,2002,12 5:30:00,30 ,       0,       0,       0,       0
sgpcmbeC1.c1,2002,12 6:30:00,31 ,       0,       0,       0,       0
sgpcmbeC1.c1,2002,12 7:30:00,31 ,       0,6.976047,2.012592,2.054731
sgpcmbeC1.c1,2002,12 8:30:00,31 ,       0,72.31083,26.77645,17.96655
sgpcmbeC1.c1,2002,12 9:30:00,31 ,0.763858,216.6527,72.93707,53.02395
sgpcmbeC1.c1,2002,1210:30:00,31 ,12.83695,319.0876,111.4692,80.36385
sgpcmbeC1.c1,2002,1211:30:00,31 , 12.2098,395.8415,134.1228,95.88863
sgpcmbeC1.c1,2002,1212:30:00,31 ,7.198063,417.4522,143.8264,105.1296
sgpcmbeC1.c1,2002,1213:30:00,31 ,6.550721,388.8324,133.3823, 103.598
sgpcmbeC1.c1,2002,1214:30:00,31 ,5.908258,314.9482,110.3255,83.84779
sgpcmbeC1.c1,2002,1215:30:00,31 ,1.974818, 205.789,66.38023,50.28106
sgpcmbeC1.c1,2002,1216:30:00,31 ,0.885514,79.35252,25.45098,20.96884
sgpcmbeC1.c1,2002,1217:30:00,31 ,       0,6.750038,1.448293,1.865399
sgpcmbeC1.c1,2002,1218:30:00,31 ,       0,       0,       0,       0
sgpcmbeC1.c1,2002,1219:30:00,31 ,       0,       0,       0,       0
sgpcmbeC1.c1,2002,1220:30:00,28 ,       0,       0,       0,       0
sgpcmbeC1.c1,2002,1221:30:00,29 ,       0,       0,       0,       0
sgpcmbeC1.c1,2002,1222:30:00,28 ,       0,       0,       0,       0
sgpcmbeC1.c1,2002,1223:30:00,27 ,       0,       0,       0,       0