datastream, year, month, tod,n, min, max, mean, std
sgpcmbeC1.c1,1997,05 0:30:00,31 ,       0,0.128345,0.004745,0.023185
sgpcmbeC1.c1,1997,05 1:30:00,31 ,       0,       0,       0,       0
sgpcmbeC1.c1,1997,05 2:30:00,31 ,       0,0.056853,0.001834,0.010211
sgpcmbeC1.c1,1997,05 3:30:00,31 ,       0,       0,       0,       0
sgpcmbeC1.c1,1997,05 4:30:00,31 ,       0,0.184383,0.005948,0.033116
sgpcmbeC1.c1,1997,05 5:30:00,31 ,       0,8.785667,3.724086, 2.97311
sgpcmbeC1.c1,1997,05 6:30:00,31 ,1.376283,25.81825,12.12388,6.259731
sgpcmbeC1.c1,1997,05 7:30:00,31 ,1.629366,37.16255,15.05053,8.196686
sgpcmbeC1.c1,1997,05 8:30:00,31 ,6.859054,45.26223,16.32374,9.751307
sgpcmbeC1.c1,1997,05 9:30:00,31 ,3.261231,54.57324, 16.5409,11.78225
sgpcmbeC1.c1,1997,0510:30:00,30 ,2.794267,54.15149,16.22471, 14.5802
sgpcmbeC1.c1,1997,0511:30:00,30 ,1.279811,57.60984,20.59209,17.69525
sgpcmbeC1.c1,1997,0512:30:00,30 ,0.654707,60.11073,23.02775,18.82091
sgpcmbeC1.c1,1997,0513:30:00,30 ,1.997748,66.09457, 26.4929,21.19957
sgpcmbeC1.c1,1997,0514:30:00,30 ,3.548369,71.21645,23.90403,21.20575
sgpcmbeC1.c1,1997,0515:30:00,30 ,4.519298,53.57948,20.59189,15.35194
sgpcmbeC1.c1,1997,0516:30:00,30 ,5.994602,54.34135,20.81111,14.13842
sgpcmbeC1.c1,1997,0517:30:00,30 ,2.857595,34.76761,18.88882,  8.4244
sgpcmbeC1.c1,1997,0518:30:00,30 ,3.588592,21.98035,13.06905,5.164983
sgpcmbeC1.c1,1997,0519:30:00,30 ,       0,7.089248, 3.05662,2.176162
sgpcmbeC1.c1,1997,0520:30:00,30 ,       0,0.157705,0.005389,0.028777
sgpcmbeC1.c1,1997,0521:30:00,30 ,       0,       0,       0,       0
sgpcmbeC1.c1,1997,0522:30:00,30 ,       0,0.044504,0.001483,0.008125
sgpcmbeC1.c1,1997,0523:30:00,30 ,       0,0.145198, 0.00484,0.026509