datastream, year, month, tod,n, min, max, mean, std
sgpcmbeC1.c1,2006,12 0:30:00,29 ,       0,       0,       0,       0
sgpcmbeC1.c1,2006,12 1:30:00,25 ,       0,       0,       0,       0
sgpcmbeC1.c1,2006,12 2:30:00,28 ,       0,       0,       0,       0
sgpcmbeC1.c1,2006,12 3:30:00,27 ,       0,       0,       0,       0
sgpcmbeC1.c1,2006,12 4:30:00,26 ,       0,       0,       0,       0
sgpcmbeC1.c1,2006,12 5:30:00,27 ,       0,0.202913,0.007515,0.039051
sgpcmbeC1.c1,2006,12 6:30:00,30 ,       0,       0,       0,       0
sgpcmbeC1.c1,2006,12 7:30:00,31 ,       0,20.34039,6.929746,5.931562
sgpcmbeC1.c1,2006,12 8:30:00,31 ,5.580866, 172.207,85.38733,52.22115
sgpcmbeC1.c1,2006,12 9:30:00,31 ,20.81814, 350.866,203.6961,107.2289
sgpcmbeC1.c1,2006,1210:30:00,31 ,32.00708,482.4635,302.7604,154.5875
sgpcmbeC1.c1,2006,1211:30:00,31 ,53.27198,565.8605,375.3451,170.3231
sgpcmbeC1.c1,2006,1212:30:00,31 , 63.9764,590.6669,409.9187,165.6845
sgpcmbeC1.c1,2006,1213:30:00,31 ,52.30339,580.9008,378.5515,151.1419
sgpcmbeC1.c1,2006,1214:30:00,31 ,49.43559,432.4164,313.4985,121.1495
sgpcmbeC1.c1,2006,1215:30:00,31 , 15.0817,268.3108,196.0221,  73.627
sgpcmbeC1.c1,2006,1216:30:00,31 ,3.485235,110.0498,71.38024,30.94603
sgpcmbeC1.c1,2006,1217:30:00,31 ,       0,8.977986,2.862557, 2.37156
sgpcmbeC1.c1,2006,1218:30:00,31 ,       0, 0.41162,0.013278,0.073929
sgpcmbeC1.c1,2006,1219:30:00,29 ,       0,       0,       0,       0
sgpcmbeC1.c1,2006,1220:30:00,29 ,       0,0.202978,0.006999,0.037692
sgpcmbeC1.c1,2006,1221:30:00,27 ,       0,0.342954,0.020655,0.076511
sgpcmbeC1.c1,2006,1222:30:00,28 ,       0,0.222772,0.007956,  0.0421
sgpcmbeC1.c1,2006,1223:30:00,29 ,       0,0.353652,0.012195,0.065671