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 ,       0,12.27259,5.636762, 2.88962
sgpcmbeC1.c1,2002,12 8:30:00,31 ,1.525269,94.33984,  21.457,22.69719
sgpcmbeC1.c1,2002,12 9:30:00,28 ,2.414798,64.76237,16.28246,15.04712
sgpcmbeC1.c1,2002,1210:30:00,27 , 0.56407,74.14417,18.35958,17.92506
sgpcmbeC1.c1,2002,1211:30:00,27 ,0.143182,72.35297, 19.4839,18.86736
sgpcmbeC1.c1,2002,1212:30:00,27 ,0.120157,173.4818,26.49156,35.91331
sgpcmbeC1.c1,2002,1213:30:00,28 ,0.363981,77.93377,20.81849,21.00433
sgpcmbeC1.c1,2002,1214:30:00,28 ,1.037517,80.54536,21.05586, 19.2265
sgpcmbeC1.c1,2002,1215:30:00,30 , 2.43382,57.13772,20.20359,17.44855
sgpcmbeC1.c1,2002,1216:30:00,31 ,4.407462,87.23898,20.76726,17.35379
sgpcmbeC1.c1,2002,1217:30:00,31 ,       0,10.46596,4.011512,2.813485
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