datastream, year, month, tod,n, min, max, mean, std
sgpcmbeC1.c1,2005,01 0:30:00,19 ,       0,54.86003,7.352313,15.23698
sgpcmbeC1.c1,2005,01 1:30:00,17 ,       0,32.19718,5.579544,9.549438
sgpcmbeC1.c1,2005,01 2:30:00,16 ,       0,106.5892,11.40703,28.57396
sgpcmbeC1.c1,2005,01 3:30:00,15 ,       0, 96.4467,9.372725,24.63807
sgpcmbeC1.c1,2005,01 4:30:00,16 ,       0,282.7639,27.27335,  74.169
sgpcmbeC1.c1,2005,01 5:30:00,16 ,       0,171.3892,20.10795,47.05019
sgpcmbeC1.c1,2005,01 6:30:00,14 ,       0,498.2387,44.36264,132.6811
sgpcmbeC1.c1,2005,01 7:30:00,14 ,       0,342.0429,39.08497,92.57193
sgpcmbeC1.c1,2005,01 8:30:00,18 ,       0,308.1329, 24.3757,72.00893
sgpcmbeC1.c1,2005,01 9:30:00,18 ,       0,208.4004,20.95711,50.64328
sgpcmbeC1.c1,2005,0110:30:00,18 ,       0,162.8998,16.63474, 38.7633
sgpcmbeC1.c1,2005,0111:30:00,18 ,       0,126.0089, 12.8394,29.67006
sgpcmbeC1.c1,2005,0112:30:00,20 ,       0,115.6169,13.90172,27.76073
sgpcmbeC1.c1,2005,0113:30:00,21 ,       0,92.22373,15.25278,24.39878
sgpcmbeC1.c1,2005,0114:30:00,21 ,       0,65.95116,14.89772,21.23904
sgpcmbeC1.c1,2005,0115:30:00,20 ,       0,61.87331,9.722323,15.85177
sgpcmbeC1.c1,2005,0116:30:00,20 ,       0,58.99842,10.28405,15.94131
sgpcmbeC1.c1,2005,0117:30:00,19 ,       0, 32.6989,7.705689,11.18047
sgpcmbeC1.c1,2005,0118:30:00,20 ,       0,36.85968,7.854584,11.40695
sgpcmbeC1.c1,2005,0119:30:00,20 ,       0,66.69839,11.19863, 17.9265
sgpcmbeC1.c1,2005,0120:30:00,20 ,       0,51.23743,7.543905, 12.2517
sgpcmbeC1.c1,2005,0121:30:00,19 ,       0,23.37401,4.856247,7.294526
sgpcmbeC1.c1,2005,0122:30:00,19 ,       0,28.00177,4.591085,7.428817
sgpcmbeC1.c1,2005,0123:30:00,18 ,       0,20.57618,5.130821,6.588897