datastream, year, month, tod,n, min, max, mean, std
sgpcmbeC1.c1,2002,03 0:30:00,19 ,       0,       0,       0,       0
sgpcmbeC1.c1,2002,03 1:30:00,19 ,       0,       0,       0,       0
sgpcmbeC1.c1,2002,03 2:30:00,21 ,       0,       0,       0,       0
sgpcmbeC1.c1,2002,03 3:30:00,22 ,       0,       0,       0,       0
sgpcmbeC1.c1,2002,03 4:30:00,21 ,       0,       0,       0,       0
sgpcmbeC1.c1,2002,03 5:30:00,25 ,       0,       0,       0,       0
sgpcmbeC1.c1,2002,03 6:30:00,27 ,       0,16.46699,6.253811,5.993371
sgpcmbeC1.c1,2002,03 7:30:00,27 ,4.947999,79.37272,22.02326,15.89769
sgpcmbeC1.c1,2002,03 8:30:00,26 ,2.676784,41.48735,18.61698,11.37316
sgpcmbeC1.c1,2002,03 9:30:00,26 ,0.824537,116.9595,24.72026,24.89871
sgpcmbeC1.c1,2002,0310:30:00,27 , 1.17103,115.1499,23.37435,24.94871
sgpcmbeC1.c1,2002,0311:30:00,27 ,0.590944,68.42047,24.29957,20.88738
sgpcmbeC1.c1,2002,0312:30:00,26 ,1.055823,171.7636,27.15958,36.00299
sgpcmbeC1.c1,2002,0313:30:00,25 ,1.461199,76.99941,18.73102, 20.2604
sgpcmbeC1.c1,2002,0314:30:00,25 ,2.296843,83.49627,20.60681,19.68091
sgpcmbeC1.c1,2002,0315:30:00,26 ,1.279654,97.06046,25.87266,24.11992
sgpcmbeC1.c1,2002,0316:30:00,27 ,2.525337,72.78465,24.87459,20.32885
sgpcmbeC1.c1,2002,0317:30:00,27 ,6.017694,59.83353,  19.908, 13.5459
sgpcmbeC1.c1,2002,0318:30:00,27 ,1.675778,26.51126,13.87023,7.207802
sgpcmbeC1.c1,2002,0319:30:00,27 ,       0,0.000503,0.000019,0.000097
sgpcmbeC1.c1,2002,0320:30:00,26 ,       0,       0,       0,       0
sgpcmbeC1.c1,2002,0321:30:00,24 ,       0,       0,       0,       0
sgpcmbeC1.c1,2002,0322:30:00,23 ,       0,       0,       0,       0
sgpcmbeC1.c1,2002,0323:30:00,20 ,       0,       0,       0,       0