datastream, year, month, tod,n, min, max, mean, std
sgpcmbeC1.c1,1998,02 0:30:00,26 ,       0,       0,       0,       0
sgpcmbeC1.c1,1998,02 1:30:00,24 ,       0,       0,       0,       0
sgpcmbeC1.c1,1998,02 2:30:00,24 ,       0,       0,       0,       0
sgpcmbeC1.c1,1998,02 3:30:00,24 ,       0,       0,       0,       0
sgpcmbeC1.c1,1998,02 4:30:00,24 ,       0,       0,       0,       0
sgpcmbeC1.c1,1998,02 5:30:00,24 ,       0,       0,       0,       0
sgpcmbeC1.c1,1998,02 6:30:00,24 ,       0,       0,       0,       0
sgpcmbeC1.c1,1998,02 7:30:00,23 ,       0,20.65755,4.536611,6.908206
sgpcmbeC1.c1,1998,02 8:30:00,22 ,0.011536,180.8412,45.96935,61.29402
sgpcmbeC1.c1,1998,02 9:30:00,22 ,0.065952,379.2815,101.7065,140.6528
sgpcmbeC1.c1,1998,0210:30:00,22 ,0.322357,533.8151,170.5005,210.7629
sgpcmbeC1.c1,1998,0211:30:00,23 ,0.490448,653.1882,219.6134,248.1646
sgpcmbeC1.c1,1998,0212:30:00,23 ,0.120018,696.0072,278.5442,  267.27
sgpcmbeC1.c1,1998,0213:30:00,22 ,0.174942,679.3253,323.4946,259.2274
sgpcmbeC1.c1,1998,0214:30:00,22 ,0.166161, 601.287,281.8385,214.0114
sgpcmbeC1.c1,1998,0215:30:00,23 ,0.053024,452.3202, 170.294,155.8045
sgpcmbeC1.c1,1998,0216:30:00,23 ,0.000048,274.6708,94.59432,104.5705
sgpcmbeC1.c1,1998,0217:30:00,22 ,0.002122,97.74247,29.04398,34.17148
sgpcmbeC1.c1,1998,0218:30:00,23 ,       0,2.766654,0.304822,0.724752
sgpcmbeC1.c1,1998,0219:30:00,25 ,       0,       0,       0,       0
sgpcmbeC1.c1,1998,0220:30:00,25 ,       0,       0,       0,       0
sgpcmbeC1.c1,1998,0221:30:00,25 ,       0,       0,       0,       0
sgpcmbeC1.c1,1998,0222:30:00,25 ,       0,       0,       0,       0
sgpcmbeC1.c1,1998,0223:30:00,25 ,       0,       0,       0,       0