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 ,       0,14.13013,3.096459,3.632567
sgpcmbeC1.c1,2005,12 8:30:00,31 , 0.03688,57.12576,27.86083,19.69258
sgpcmbeC1.c1,2005,12 9:30:00,31 ,0.053599,104.2619,30.84983,23.56508
sgpcmbeC1.c1,2005,1210:30:00,31 ,0.148758,128.9246,32.50916,30.10011
sgpcmbeC1.c1,2005,1211:30:00,30 ,0.092186,165.9176,29.16232,41.00823
sgpcmbeC1.c1,2005,1212:30:00,31 ,       0,181.2739,37.53926,54.59446
sgpcmbeC1.c1,2005,1213:30:00,31 , 0.01632,196.0158, 44.8562,52.56949
sgpcmbeC1.c1,2005,1214:30:00,31 ,       0,93.84023,32.08707,24.10224
sgpcmbeC1.c1,2005,1215:30:00,31 ,       0,70.99805,32.07217,23.01991
sgpcmbeC1.c1,2005,1216:30:00,31 ,       0,50.70279,23.83316,18.40963
sgpcmbeC1.c1,2005,1217:30:00,31 ,       0, 5.96479,1.772679, 1.74582
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