datastream, year, month, tod,n, min, max, mean, std
sgpcmbeC1.c1,1999,12 0:30:00,30 ,       0,0.181178, 0.01149,0.040209
sgpcmbeC1.c1,1999,12 1:30:00,29 ,       0,0.006914,0.000434, 0.00163
sgpcmbeC1.c1,1999,12 2:30:00,30 ,       0,0.336287,0.014287,  0.0616
sgpcmbeC1.c1,1999,12 3:30:00,29 ,       0,0.351351,0.012116,0.065244
sgpcmbeC1.c1,1999,12 4:30:00,30 ,       0,0.114818,0.007876,0.025784
sgpcmbeC1.c1,1999,12 5:30:00,30 ,       0,       0,       0,       0
sgpcmbeC1.c1,1999,12 6:30:00,31 ,       0,       0,       0,       0
sgpcmbeC1.c1,1999,12 7:30:00,31 ,0.225685,8.892877,2.098823,1.950737
sgpcmbeC1.c1,1999,12 8:30:00,31 , 0.04472,100.3913, 45.5261,36.08214
sgpcmbeC1.c1,1999,12 9:30:00,31 ,0.168495,  256.97, 120.944,100.9617
sgpcmbeC1.c1,1999,1210:30:00,31 ,0.196106,388.9182,223.1961,155.4197
sgpcmbeC1.c1,1999,1211:30:00,31 ,0.120506,472.3444,283.1088,184.0145
sgpcmbeC1.c1,1999,1212:30:00,31 ,0.170206,504.1425,311.9276,194.0865
sgpcmbeC1.c1,1999,1213:30:00,31 , 0.16243,470.8888, 284.471,184.0478
sgpcmbeC1.c1,1999,1214:30:00,31 ,0.037514,374.8264, 225.285,148.0895
sgpcmbeC1.c1,1999,1215:30:00,31 ,0.030018,241.6228,139.6357,100.3691
sgpcmbeC1.c1,1999,1216:30:00,31 ,       0,89.06914,44.87315,32.73772
sgpcmbeC1.c1,1999,1217:30:00,31 , 0.18258,3.537387,1.060231,0.948405
sgpcmbeC1.c1,1999,1218:30:00,31 ,       0,       0,       0,       0
sgpcmbeC1.c1,1999,1219:30:00,31 ,       0,0.030169,0.001994,0.006259
sgpcmbeC1.c1,1999,1220:30:00,30 ,       0,0.095696,0.007719,0.023944
sgpcmbeC1.c1,1999,1221:30:00,31 ,       0,0.025966,0.001412,0.004982
sgpcmbeC1.c1,1999,1222:30:00,31 ,       0,0.103403,0.008997,0.026384
sgpcmbeC1.c1,1999,1223:30:00,29 ,       0,0.046471,0.001838, 0.00862