datastream, year, month, tod,n, min, max, mean, std
sgpcmbeC1.c1,1997,03 0:30:00,9 ,       0,0.252683,0.028076,0.084228
sgpcmbeC1.c1,1997,03 1:30:00,10 ,       0,       0,       0,       0
sgpcmbeC1.c1,1997,03 2:30:00,10 ,       0,       0,       0,       0
sgpcmbeC1.c1,1997,03 3:30:00,10 ,       0,       0,       0,       0
sgpcmbeC1.c1,1997,03 4:30:00,10 ,       0,       0,       0,       0
sgpcmbeC1.c1,1997,03 5:30:00,11 ,       0,       0,       0,       0
sgpcmbeC1.c1,1997,03 6:30:00,11 ,1.183301,13.88493,8.365789,4.588426
sgpcmbeC1.c1,1997,03 7:30:00,11 ,0.531295,35.92208,8.806411,  9.6339
sgpcmbeC1.c1,1997,03 8:30:00,11 ,0.399151,49.83454,9.577114,15.53244
sgpcmbeC1.c1,1997,03 9:30:00,10 ,1.396185,28.59414,6.593269,8.400786
sgpcmbeC1.c1,1997,0310:30:00,10 , 1.05242,69.43908,11.31935,21.80714
sgpcmbeC1.c1,1997,0311:30:00,10 ,0.962701,77.81583,17.60949, 30.4766
sgpcmbeC1.c1,1997,0312:30:00,10 ,0.781387,86.98583,23.73087,28.29306
sgpcmbeC1.c1,1997,0313:30:00,10 ,0.917998,123.1984,19.26308,37.49828
sgpcmbeC1.c1,1997,0314:30:00,10 ,0.996081,88.66062,22.78601,34.01383
sgpcmbeC1.c1,1997,0315:30:00,11 ,1.028709,34.15035, 7.25405,10.67477
sgpcmbeC1.c1,1997,0316:30:00,11 ,1.437144,29.62438,8.342782,9.494242
sgpcmbeC1.c1,1997,0317:30:00,10 ,1.261447,33.08495,13.45181,12.44896
sgpcmbeC1.c1,1997,0318:30:00,10 ,1.836044,23.89657,12.32634,7.058182
sgpcmbeC1.c1,1997,0319:30:00,11 ,       0,1.629449, 0.28825,0.641619
sgpcmbeC1.c1,1997,0320:30:00,11 ,       0,       0,       0,       0
sgpcmbeC1.c1,1997,0321:30:00,11 ,       0,1.680035,0.200769,0.515593
sgpcmbeC1.c1,1997,0322:30:00,11 ,       0,1.794872,0.184476,0.538716
sgpcmbeC1.c1,1997,0323:30:00,8 ,       0,       0,       0,       0