datastream, year, month, tod,n, min, max, mean, std
sgpcmbeC1.c1,1998,04 0:30:00,30 ,       0,0.041964,0.001399,0.007661
sgpcmbeC1.c1,1998,04 1:30:00,30 ,       0,0.328154,0.012493,0.060223
sgpcmbeC1.c1,1998,04 2:30:00,30 ,       0,       0,       0,       0
sgpcmbeC1.c1,1998,04 3:30:00,30 ,       0,0.211238,0.007041,0.038567
sgpcmbeC1.c1,1998,04 4:30:00,30 ,       0,0.079223,0.002641,0.014464
sgpcmbeC1.c1,1998,04 5:30:00,30 ,       0,1.919259,0.251788,0.462957
sgpcmbeC1.c1,1998,04 6:30:00,30 ,0.589884,14.27318, 8.30093,4.258478
sgpcmbeC1.c1,1998,04 7:30:00,30 ,1.007561,26.63572,10.97439, 5.22405
sgpcmbeC1.c1,1998,04 8:30:00,30 ,2.734263,37.17834,13.60353,8.750475
sgpcmbeC1.c1,1998,04 9:30:00,30 , 2.49704,  38.348,11.21115,8.293072
sgpcmbeC1.c1,1998,0410:30:00,30 , 1.22531,51.90276,13.78098,13.77387
sgpcmbeC1.c1,1998,0411:30:00,30 ,1.366391,45.57915,14.48346,14.40773
sgpcmbeC1.c1,1998,0412:30:00,30 ,0.599958, 67.5421,17.08561,20.91431
sgpcmbeC1.c1,1998,0413:30:00,30 ,1.743466,61.02789,17.77401,18.62652
sgpcmbeC1.c1,1998,0414:30:00,30 ,4.063981,65.25877, 19.0467, 18.8817
sgpcmbeC1.c1,1998,0415:30:00,30 ,3.243138,49.78464, 15.4751,12.02289
sgpcmbeC1.c1,1998,0416:30:00,30 ,2.319422,43.02374,15.42425,10.58483
sgpcmbeC1.c1,1998,0417:30:00,30 ,1.550917,29.92152,14.53462,7.864289
sgpcmbeC1.c1,1998,0418:30:00,30 ,0.296278,15.42854,8.063794,5.014241
sgpcmbeC1.c1,1998,0419:30:00,30 ,       0,1.110742,0.107109,0.251206
sgpcmbeC1.c1,1998,0420:30:00,30 ,       0,       0,       0,       0
sgpcmbeC1.c1,1998,0421:30:00,30 ,       0,0.884226,0.029474,0.161437
sgpcmbeC1.c1,1998,0422:30:00,30 ,       0,0.034206, 0.00114,0.006245
sgpcmbeC1.c1,1998,0423:30:00,30 ,       0,0.049714,0.001657,0.009076