datastream, year, month, tod,n, min, max, mean, std
sgpcmbeC1.c1,2004,01 0:30:00,30 ,       0,2.582249,1.234988,0.854339
sgpcmbeC1.c1,2004,01 1:30:00,28 ,       0,2.651459,1.297744,0.878901
sgpcmbeC1.c1,2004,01 2:30:00,28 ,       0,2.772493,1.369577,0.930098
sgpcmbeC1.c1,2004,01 3:30:00,25 ,       0,2.570364,1.508014,0.837277
sgpcmbeC1.c1,2004,01 4:30:00,25 ,       0,2.715675,1.561471,0.809966
sgpcmbeC1.c1,2004,01 5:30:00,29 ,       0,2.790454, 1.27986,0.926868
sgpcmbeC1.c1,2004,01 6:30:00,30 ,       0,2.785861,1.211798,0.926547
sgpcmbeC1.c1,2004,01 7:30:00,31 ,  0.0451,10.21425,3.389884,2.697638
sgpcmbeC1.c1,2004,01 8:30:00,31 ,4.710364,136.1724,68.08121,41.79892
sgpcmbeC1.c1,2004,01 9:30:00,31 ,21.72689,328.1709,180.3569,105.6341
sgpcmbeC1.c1,2004,0110:30:00,31 , 40.5219,488.4242, 281.462,151.5682
sgpcmbeC1.c1,2004,0111:30:00,31 ,33.07064,594.1893,362.8539,186.6771
sgpcmbeC1.c1,2004,0112:30:00,31 , 36.9195,639.3018,403.1164,203.3643
sgpcmbeC1.c1,2004,0113:30:00,31 ,49.67066,613.5368,397.1315,191.9611
sgpcmbeC1.c1,2004,0114:30:00,31 , 61.1014,540.0253,343.9184,158.7466
sgpcmbeC1.c1,2004,0115:30:00,31 , 24.4362,397.8722,239.5786, 113.524
sgpcmbeC1.c1,2004,0116:30:00,31 ,15.57432,217.8565,116.5565,59.09319
sgpcmbeC1.c1,2004,0117:30:00,31 ,1.982947,41.54148,14.39973,11.80369
sgpcmbeC1.c1,2004,0118:30:00,31 ,       0,3.059624,1.161702, 0.96827
sgpcmbeC1.c1,2004,0119:30:00,31 ,       0, 2.85496,1.210044,0.949548
sgpcmbeC1.c1,2004,0120:30:00,30 ,       0,2.737088,1.233822, 0.91333
sgpcmbeC1.c1,2004,0121:30:00,29 ,       0,2.749762,1.248562,0.787664
sgpcmbeC1.c1,2004,0122:30:00,29 ,       0,2.467371, 1.16126,0.809467
sgpcmbeC1.c1,2004,0123:30:00,29 ,       0,2.549332,1.221012,0.852946