datastream, year, month, tod,n, min, max, mean, std
sgpcmbeC1.c1,1997,10 0:30:00,31 ,       0,       0,       0,       0
sgpcmbeC1.c1,1997,10 1:30:00,31 ,       0,0.147023,0.004954,0.026393
sgpcmbeC1.c1,1997,10 2:30:00,31 ,       0,0.067513,0.002228, 0.01212
sgpcmbeC1.c1,1997,10 3:30:00,31 ,       0,       0,       0,       0
sgpcmbeC1.c1,1997,10 4:30:00,31 ,       0,       0,       0,       0
sgpcmbeC1.c1,1997,10 5:30:00,31 ,       0,       0,       0,       0
sgpcmbeC1.c1,1997,10 6:30:00,31 ,       0,6.812903, 1.61018,1.950454
sgpcmbeC1.c1,1997,10 7:30:00,30 ,0.811634, 19.6338,9.411211, 6.21053
sgpcmbeC1.c1,1997,10 8:30:00,29 ,1.225088,30.47444,10.84239,6.596473
sgpcmbeC1.c1,1997,10 9:30:00,29 ,1.559232,36.81264,9.823641,6.702295
sgpcmbeC1.c1,1997,1010:30:00,31 ,1.998042,32.26749,8.792451,7.443987
sgpcmbeC1.c1,1997,1011:30:00,31 ,1.535832,42.64884,8.333801,9.126254
sgpcmbeC1.c1,1997,1012:30:00,31 ,0.876001,49.26774,10.38669,13.07556
sgpcmbeC1.c1,1997,1013:30:00,31 , 1.27537,45.57702,  13.229,14.45806
sgpcmbeC1.c1,1997,1014:30:00,31 ,1.471786, 42.6741,13.65736,11.95663
sgpcmbeC1.c1,1997,1015:30:00,31 ,2.021079,35.96915,14.45944,10.41642
sgpcmbeC1.c1,1997,1016:30:00,31 ,0.587444,21.57764,11.21801,6.248996
sgpcmbeC1.c1,1997,1017:30:00,31 , 0.13088,13.80045,6.876063,4.214765
sgpcmbeC1.c1,1997,1018:30:00,31 ,       0,5.804182,0.215117,1.041563
sgpcmbeC1.c1,1997,1019:30:00,31 ,       0,0.079182,0.002554,0.014221
sgpcmbeC1.c1,1997,1020:30:00,31 ,       0,       0,       0,       0
sgpcmbeC1.c1,1997,1021:30:00,31 ,       0,       0,       0,       0
sgpcmbeC1.c1,1997,1022:30:00,31 ,       0,0.065394,0.003826,0.014437
sgpcmbeC1.c1,1997,1023:30:00,31 ,       0,       0,       0,       0