datastream, year, month, tod,n, min, max, mean, std
sgpcmbeC1.c1,2002,03 0:30:00,19 ,       0,       0,       0,       0
sgpcmbeC1.c1,2002,03 1:30:00,19 ,       0,       0,       0,       0
sgpcmbeC1.c1,2002,03 2:30:00,21 ,       0,       0,       0,       0
sgpcmbeC1.c1,2002,03 3:30:00,22 ,       0,       0,       0,       0
sgpcmbeC1.c1,2002,03 4:30:00,21 ,       0,       0,       0,       0
sgpcmbeC1.c1,2002,03 5:30:00,25 ,       0,       0,       0,       0
sgpcmbeC1.c1,2002,03 6:30:00,27 ,       0,30.40302,8.664515,9.428506
sgpcmbeC1.c1,2002,03 7:30:00,27 ,4.982868,77.06448,45.18251,24.39564
sgpcmbeC1.c1,2002,03 8:30:00,27 ,2.680643,81.39856, 49.6284,23.29114
sgpcmbeC1.c1,2002,03 9:30:00,27 , 7.17863,125.2642,56.80825,28.62429
sgpcmbeC1.c1,2002,0310:30:00,28 ,14.36502,146.7954,57.18431,34.53406
sgpcmbeC1.c1,2002,0311:30:00,28 ,  8.5894,155.3858,49.67336,39.88609
sgpcmbeC1.c1,2002,0312:30:00,27 ,2.515877,141.9117, 42.4088,45.53199
sgpcmbeC1.c1,2002,0313:30:00,26 ,10.14492,162.9597,40.36342, 36.3194
sgpcmbeC1.c1,2002,0314:30:00,26 ,7.547281,189.0361,55.74085,40.59623
sgpcmbeC1.c1,2002,0315:30:00,27 ,11.25615, 202.518,74.54683,46.97045
sgpcmbeC1.c1,2002,0316:30:00,27 ,13.03362,119.7356,61.37228,27.90959
sgpcmbeC1.c1,2002,0317:30:00,27 ,6.024848,94.16018,48.80819,23.18954
sgpcmbeC1.c1,2002,0318:30:00,27 ,1.675858,36.75279,19.80888,10.73975
sgpcmbeC1.c1,2002,0319:30:00,27 ,       0,0.942671,0.092258,0.268066
sgpcmbeC1.c1,2002,0320:30:00,26 ,       0,       0,       0,       0
sgpcmbeC1.c1,2002,0321:30:00,24 ,       0,       0,       0,       0
sgpcmbeC1.c1,2002,0322:30:00,23 ,       0,       0,       0,       0
sgpcmbeC1.c1,2002,0323:30:00,20 ,       0,       0,       0,       0