datastream, year, month, tod,n, min, max, mean, std
sgpcmbeC1.c1,2005,12 0:30:00,25 ,       0,       0,       0,       0
sgpcmbeC1.c1,2005,12 1:30:00,22 ,       0,       0,       0,       0
sgpcmbeC1.c1,2005,12 2:30:00,23 ,       0,       0,       0,       0
sgpcmbeC1.c1,2005,12 3:30:00,26 ,       0,       0,       0,       0
sgpcmbeC1.c1,2005,12 4:30:00,27 ,       0,       0,       0,       0
sgpcmbeC1.c1,2005,12 5:30:00,28 ,       0,       0,       0,       0
sgpcmbeC1.c1,2005,12 6:30:00,29 ,       0,       0,       0,       0
sgpcmbeC1.c1,2005,12 7:30:00,31 ,       0,10.49595,4.220268,2.800735
sgpcmbeC1.c1,2005,12 8:30:00,31 ,6.248095,74.58849,38.97166,16.08063
sgpcmbeC1.c1,2005,12 9:30:00,31 ,39.38049,153.7603,84.68286, 41.8874
sgpcmbeC1.c1,2005,1210:30:00,31 ,45.38417,249.9427,120.3451, 68.3605
sgpcmbeC1.c1,2005,1211:30:00,30 ,48.73009, 275.933,131.1089,80.39535
sgpcmbeC1.c1,2005,1212:30:00,31 ,50.88618,314.5397,142.0056,90.13506
sgpcmbeC1.c1,2005,1213:30:00,31 ,49.79005,297.0675,127.4183,76.07063
sgpcmbeC1.c1,2005,1214:30:00,31 ,48.08956,210.7866,87.77535,46.72767
sgpcmbeC1.c1,2005,1215:30:00,31 ,18.03208,151.6555,64.32099,35.78598
sgpcmbeC1.c1,2005,1216:30:00,31 ,6.350604,58.94518,30.96501,13.05298
sgpcmbeC1.c1,2005,1217:30:00,31 ,       0,5.745072,2.381502,1.691627
sgpcmbeC1.c1,2005,1218:30:00,22 ,       0,       0,       0,       0
sgpcmbeC1.c1,2005,1219:30:00,23 ,       0,       0,       0,       0
sgpcmbeC1.c1,2005,1220:30:00,23 ,       0,       0,       0,       0
sgpcmbeC1.c1,2005,1221:30:00,22 ,       0,       0,       0,       0
sgpcmbeC1.c1,2005,1222:30:00,22 ,       0,       0,       0,       0
sgpcmbeC1.c1,2005,1223:30:00,24 ,       0,       0,       0,       0