datastream, year, month, tod,n, min, max, mean, std
sgpcmbeC1.c1,2007,02 0:30:00,20 ,       0,2.176555,0.615164,0.784443
sgpcmbeC1.c1,2007,02 1:30:00,19 ,       0,2.082879,0.845728,0.736992
sgpcmbeC1.c1,2007,02 2:30:00,18 ,       0,2.305193,0.836019,0.814608
sgpcmbeC1.c1,2007,02 3:30:00,19 ,       0,2.810265,0.781986,0.896834
sgpcmbeC1.c1,2007,02 4:30:00,18 ,       0,2.475867,0.821496, 0.86078
sgpcmbeC1.c1,2007,02 5:30:00,20 ,       0,1.800416,0.410068,0.604653
sgpcmbeC1.c1,2007,02 6:30:00,26 ,       0,2.999888,0.663531,0.827823
sgpcmbeC1.c1,2007,02 7:30:00,28 ,1.426496,56.78461,22.92184,17.23104
sgpcmbeC1.c1,2007,02 8:30:00,28 ,13.53122,250.0617,143.1471,  79.405
sgpcmbeC1.c1,2007,02 9:30:00,28 ,18.39731,450.5234,294.8565,135.0049
sgpcmbeC1.c1,2007,0210:30:00,28 ,21.67117,621.8367,419.8777,189.4367
sgpcmbeC1.c1,2007,0211:30:00,28 ,106.0675,  744.93,526.9452,219.0907
sgpcmbeC1.c1,2007,0212:30:00,28 ,137.4781,790.7294,566.4072,230.1389
sgpcmbeC1.c1,2007,0213:30:00,28 ,69.37314,763.9289,555.6484,216.9917
sgpcmbeC1.c1,2007,0214:30:00,28 , 80.2207,672.7353,465.7155,193.3332
sgpcmbeC1.c1,2007,0215:30:00,28 ,72.75005,514.6184,339.2129,141.5421
sgpcmbeC1.c1,2007,0216:30:00,28 ,40.46508,329.2134,197.7744,90.83622
sgpcmbeC1.c1,2007,0217:30:00,28 ,7.400016,130.6767,59.45352,37.64476
sgpcmbeC1.c1,2007,0218:30:00,28 ,       0, 6.42978,1.944818,1.972871
sgpcmbeC1.c1,2007,0219:30:00,23 ,       0,2.953125,0.717649,0.983836
sgpcmbeC1.c1,2007,0220:30:00,22 ,       0,3.372671,0.729981,0.988314
sgpcmbeC1.c1,2007,0221:30:00,20 ,       0,3.442216,  0.6128,0.965456
sgpcmbeC1.c1,2007,0222:30:00,23 ,       0,3.616639,0.463487,0.920198
sgpcmbeC1.c1,2007,0223:30:00,21 ,       0,3.344395,0.448475,0.881518