datastream, year, month, tod,n, min, max, mean, std
sgpcmbeC1.c1,2006,11 0:30:00,30 ,       0,5.277734,0.511311,1.291301
sgpcmbeC1.c1,2006,11 1:30:00,29 ,       0,5.918468, 0.48514,1.217972
sgpcmbeC1.c1,2006,11 2:30:00,29 ,       0,13.12463,0.664313,2.437635
sgpcmbeC1.c1,2006,11 3:30:00,29 ,       0,9.795036,1.016844,2.277497
sgpcmbeC1.c1,2006,11 4:30:00,29 ,       0,12.67365, 0.96814,2.951593
sgpcmbeC1.c1,2006,11 5:30:00,30 ,       0,15.59355,1.665265,3.996616
sgpcmbeC1.c1,2006,11 6:30:00,30 ,       0, 9.00082,1.160055,2.601171
sgpcmbeC1.c1,2006,11 7:30:00,30 ,       0,23.28224,6.567645, 5.93951
sgpcmbeC1.c1,2006,11 8:30:00,24 ,0.329525, 40.8185,12.05641,8.572571
sgpcmbeC1.c1,2006,11 9:30:00,27 , 1.83136,26.26838,10.89319,5.897782
sgpcmbeC1.c1,2006,1110:30:00,26 ,4.499877, 31.7041,12.36539,9.355184
sgpcmbeC1.c1,2006,1111:30:00,28 ,0.924093,35.45097,13.81547,11.06199
sgpcmbeC1.c1,2006,1112:30:00,29 ,0.650122,29.93749,10.93765, 10.3451
sgpcmbeC1.c1,2006,1113:30:00,29 ,1.502611,32.73378,11.39546,8.991921
sgpcmbeC1.c1,2006,1114:30:00,29 , 1.62441,41.54977,12.67792,10.13241
sgpcmbeC1.c1,2006,1115:30:00,29 ,0.969647,38.60799,12.75059,8.061677
sgpcmbeC1.c1,2006,1116:30:00,29 , 0.96043,18.22269,10.08658,4.938789
sgpcmbeC1.c1,2006,1117:30:00,30 ,       0,5.718171,2.120692,1.498268
sgpcmbeC1.c1,2006,1118:30:00,29 ,       0,  2.7798,0.173609,0.563923
sgpcmbeC1.c1,2006,1119:30:00,29 ,       0, 3.52724,0.248858,0.701558
sgpcmbeC1.c1,2006,1120:30:00,29 ,       0,8.041773, 0.41671,1.508993
sgpcmbeC1.c1,2006,1121:30:00,29 ,       0,2.762498,0.303454,0.648173
sgpcmbeC1.c1,2006,1122:30:00,29 ,       0,6.788913,0.496648,1.337488
sgpcmbeC1.c1,2006,1123:30:00,29 ,       0, 12.8419,0.971092,2.776107