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 ,  0.0451,4.998358,1.265005,1.163192
sgpcmbeC1.c1,2004,01 8:30:00,31 ,0.048136, 103.102,31.56589,33.37153
sgpcmbeC1.c1,2004,01 9:30:00,31 ,0.000294,273.1473,103.2889,101.0746
sgpcmbeC1.c1,2004,0110:30:00,31 ,0.012806, 421.045,170.2259,162.8573
sgpcmbeC1.c1,2004,0111:30:00,31 ,0.031548,519.5309,234.0638,199.8298
sgpcmbeC1.c1,2004,0112:30:00,31 ,0.003624,559.7185,267.7336,220.1626
sgpcmbeC1.c1,2004,0113:30:00,31 ,0.001255,528.5886,275.4333,210.6317
sgpcmbeC1.c1,2004,0114:30:00,31 , 0.05077, 468.394,235.1583,179.6469
sgpcmbeC1.c1,2004,0115:30:00,31 ,0.084602,337.8712,153.1948,127.4505
sgpcmbeC1.c1,2004,0116:30:00,31 ,0.031023,174.7498,66.19785,59.64824
sgpcmbeC1.c1,2004,0117:30:00,31 , 0.14289,28.44928,6.687702,8.531109
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