datastream, year, month, tod,n, min, max, mean, std
sgpcmbeC1.c1,2004,12 0:30:00,31 ,       0,2.344556,0.374976,0.665958
sgpcmbeC1.c1,2004,12 1:30:00,31 ,       0,1.752383,0.214224,0.538035
sgpcmbeC1.c1,2004,12 2:30:00,31 ,       0, 1.59298,0.128416,0.407325
sgpcmbeC1.c1,2004,12 3:30:00,31 ,       0,1.845978,0.233915,0.525898
sgpcmbeC1.c1,2004,12 4:30:00,31 ,       0,1.671651,0.207223,0.468907
sgpcmbeC1.c1,2004,12 5:30:00,31 ,       0, 1.32229,0.113724,0.317617
sgpcmbeC1.c1,2004,12 6:30:00,31 ,       0,1.210045,0.068628,0.268319
sgpcmbeC1.c1,2004,12 7:30:00,31 ,2.134979,24.02184,11.14044,5.591237
sgpcmbeC1.c1,2004,12 8:30:00,31 , 7.91663,61.55207,43.06926,16.60964
sgpcmbeC1.c1,2004,12 9:30:00,31 ,12.35726,87.93639,46.47165,17.56265
sgpcmbeC1.c1,2004,1210:30:00,31 ,9.900215,116.9734,45.12155,28.79629
sgpcmbeC1.c1,2004,1211:30:00,31 ,12.56949,106.8982,36.11136,27.64549
sgpcmbeC1.c1,2004,1212:30:00,31 ,1.965007,127.9356,23.86154, 32.5912
sgpcmbeC1.c1,2004,1213:30:00,31 ,9.347375,138.1329,37.79261,33.61992
sgpcmbeC1.c1,2004,1214:30:00,31 ,5.954329,116.7484,39.47373,20.93473
sgpcmbeC1.c1,2004,1215:30:00,31 ,2.890248,  84.792,46.75151,16.38097
sgpcmbeC1.c1,2004,1216:30:00,31 ,10.58702,59.45247,40.95969,11.80728
sgpcmbeC1.c1,2004,1217:30:00,31 ,3.529056,11.60473,7.456569,1.984692
sgpcmbeC1.c1,2004,1218:30:00,31 ,       0,1.683962,0.869195,0.730834
sgpcmbeC1.c1,2004,1219:30:00,31 ,       0,1.631063,0.652338,0.689445
sgpcmbeC1.c1,2004,1220:30:00,31 ,       0,1.712158,0.789076, 0.71514
sgpcmbeC1.c1,2004,1221:30:00,31 ,       0,1.713081,0.498479,0.628195
sgpcmbeC1.c1,2004,1222:30:00,31 ,       0, 1.63905,0.438128,0.607253
sgpcmbeC1.c1,2004,1223:30:00,31 ,       0,1.807387,0.271283,0.552325