datastream, year, month, tod,n, min, max, mean, std
sgpcmbeC1.c1,2005,03 0:30:00,31 ,       0,       0,       0,       0
sgpcmbeC1.c1,2005,03 1:30:00,31 ,       0,       0,       0,       0
sgpcmbeC1.c1,2005,03 2:30:00,31 ,       0,0.048189,0.001554,0.008655
sgpcmbeC1.c1,2005,03 3:30:00,31 ,       0,0.061204,0.001974,0.010993
sgpcmbeC1.c1,2005,03 4:30:00,31 ,       0,       0,       0,       0
sgpcmbeC1.c1,2005,03 5:30:00,31 ,       0,       0,       0,       0
sgpcmbeC1.c1,2005,03 6:30:00,31 ,       0,10.71574, 1.97015,2.776907
sgpcmbeC1.c1,2005,03 7:30:00,30 ,0.437087,21.41142,9.799644,5.328894
sgpcmbeC1.c1,2005,03 8:30:00,31 ,1.665679,34.01974,11.48624,7.627528
sgpcmbeC1.c1,2005,03 9:30:00,31 ,3.586749,36.58175,13.24657,8.961809
sgpcmbeC1.c1,2005,0310:30:00,31 , 1.87469,47.15505,13.21234,11.30685
sgpcmbeC1.c1,2005,0311:30:00,31 ,2.744773,60.18213,14.14723,14.71061
sgpcmbeC1.c1,2005,0312:30:00,31 ,0.417401, 46.1596,15.45093,14.67997
sgpcmbeC1.c1,2005,0313:30:00,31 ,2.460574,69.89292,18.90674,18.67363
sgpcmbeC1.c1,2005,0314:30:00,31 ,1.927965,59.34618,18.49481,16.94402
sgpcmbeC1.c1,2005,0315:30:00,31 ,1.516134,46.44521,17.43385,12.64882
sgpcmbeC1.c1,2005,0316:30:00,31 ,1.448846,32.34199,14.09009, 7.63071
sgpcmbeC1.c1,2005,0317:30:00,31 ,0.912605, 21.6318,10.28024,5.536887
sgpcmbeC1.c1,2005,0318:30:00,31 ,       0, 9.56874,4.040361,2.675267
sgpcmbeC1.c1,2005,0319:30:00,31 ,       0,0.049487,0.001596,0.008888
sgpcmbeC1.c1,2005,0320:30:00,31 ,       0,0.091697,0.002958,0.016469
sgpcmbeC1.c1,2005,0321:30:00,31 ,       0,       0,       0,       0
sgpcmbeC1.c1,2005,0322:30:00,31 ,       0,0.048876,0.001577,0.008778
sgpcmbeC1.c1,2005,0323:30:00,31 ,       0,       0,       0,       0