datastream, year, month, tod,n, min, max, mean, std
sgpcmbeC1.c1,2004,02 0:30:00,26 ,       0,1.544787,0.110755,0.392391
sgpcmbeC1.c1,2004,02 1:30:00,26 ,       0,0.418955,0.016114,0.082164
sgpcmbeC1.c1,2004,02 2:30:00,26 ,       0,0.670637,0.025794,0.131523
sgpcmbeC1.c1,2004,02 3:30:00,27 ,       0,0.677508,0.025093,0.130386
sgpcmbeC1.c1,2004,02 4:30:00,25 ,       0,1.151805,0.046072,0.230361
sgpcmbeC1.c1,2004,02 5:30:00,28 ,       0,       0,       0,       0
sgpcmbeC1.c1,2004,02 6:30:00,29 ,       0,1.032434,0.035601,0.191718
sgpcmbeC1.c1,2004,02 7:30:00,29 ,       0,  46.906, 17.5858,12.02551
sgpcmbeC1.c1,2004,02 8:30:00,29 ,2.824361,70.84275,39.76539,21.51184
sgpcmbeC1.c1,2004,02 9:30:00,29 ,6.448355,153.0135,51.74949,29.02088
sgpcmbeC1.c1,2004,0210:30:00,29 ,11.59216, 110.697,56.31781,29.78206
sgpcmbeC1.c1,2004,0211:30:00,29 ,15.48128,146.2021,46.46447,31.81807
sgpcmbeC1.c1,2004,0212:30:00,29 ,4.054552,158.8738,46.78765, 46.5287
sgpcmbeC1.c1,2004,0213:30:00,29 ,14.04713,193.6748,57.74753,54.84671
sgpcmbeC1.c1,2004,0214:30:00,29 ,7.041119,212.0405,65.39348,51.48359
sgpcmbeC1.c1,2004,0215:30:00,29 ,3.804199,170.5054,66.02428,37.09634
sgpcmbeC1.c1,2004,0216:30:00,29 ,2.632332,125.4507,51.61897,26.27322
sgpcmbeC1.c1,2004,0217:30:00,29 ,       0,74.08926,40.70504,  18.198
sgpcmbeC1.c1,2004,0218:30:00,29 ,       0,12.42539,2.471941,2.853153
sgpcmbeC1.c1,2004,0219:30:00,29 ,       0,1.345597,0.085219, 0.32001
sgpcmbeC1.c1,2004,0220:30:00,29 ,       0,1.487179,0.051282,0.276162
sgpcmbeC1.c1,2004,0221:30:00,28 ,       0,1.163023,0.041537,0.219791
sgpcmbeC1.c1,2004,0222:30:00,27 ,       0, 1.53477,0.151369,0.438299
sgpcmbeC1.c1,2004,0223:30:00,27 ,       0,1.099618,0.092662,0.277793