datastream, year, month, tod,n, min, max, mean, std
sgpcmbeC1.c1,1998,02 0:30:00,26 ,       0,0.036316,  0.0034,0.009759
sgpcmbeC1.c1,1998,02 1:30:00,24 ,       0,0.093172,0.005356,0.019385
sgpcmbeC1.c1,1998,02 2:30:00,24 ,       0,0.088799,0.006732,0.020495
sgpcmbeC1.c1,1998,02 3:30:00,24 ,       0,0.177964, 0.01507,0.040931
sgpcmbeC1.c1,1998,02 4:30:00,24 ,       0,0.022742,0.002295,0.006388
sgpcmbeC1.c1,1998,02 5:30:00,24 ,       0,0.002334,0.000097,0.000476
sgpcmbeC1.c1,1998,02 6:30:00,24 ,       0,       0,       0,       0
sgpcmbeC1.c1,1998,02 7:30:00,23 ,       0,12.79826,3.843657,3.954948
sgpcmbeC1.c1,1998,02 8:30:00,22 ,1.072944,24.14609,8.050277,6.506196
sgpcmbeC1.c1,1998,02 9:30:00,22 ,1.584788,27.72991,9.772278,7.608549
sgpcmbeC1.c1,1998,0210:30:00,22 ,1.627053,39.06131,11.48286,9.501133
sgpcmbeC1.c1,1998,0211:30:00,23 ,2.456702,36.28669,12.15829,10.89391
sgpcmbeC1.c1,1998,0212:30:00,23 ,0.552777,38.09681, 11.6942, 11.6011
sgpcmbeC1.c1,1998,0213:30:00,22 ,0.977347,33.13396,13.72559,11.82716
sgpcmbeC1.c1,1998,0214:30:00,22 , 2.97661,38.53222,14.66199,11.34671
sgpcmbeC1.c1,1998,0215:30:00,23 ,1.201675,40.94299,15.76427,11.29202
sgpcmbeC1.c1,1998,0216:30:00,23 ,1.801936,27.48376,10.35825,6.506452
sgpcmbeC1.c1,1998,0217:30:00,22 , 0.92342,15.56999,7.775714,5.144807
sgpcmbeC1.c1,1998,0218:30:00,23 ,       0,4.054846,0.673661,1.163875
sgpcmbeC1.c1,1998,0219:30:00,25 ,       0,0.078267,0.003131,0.015653
sgpcmbeC1.c1,1998,0220:30:00,25 ,       0,       0,       0,       0
sgpcmbeC1.c1,1998,0221:30:00,25 ,       0,0.008554,0.000404,0.001726
sgpcmbeC1.c1,1998,0222:30:00,25 ,       0,0.058265,0.003073,0.012033
sgpcmbeC1.c1,1998,0223:30:00,25 ,       0,0.003954,0.000189,  0.0008