datastream, year, month, tod,n, min, max, mean, std
sgpcmbeC1.c1,1998,09 0:30:00,27 ,       0,       0,       0,       0
sgpcmbeC1.c1,1998,09 1:30:00,27 ,       0,0.057773, 0.00214,0.011118
sgpcmbeC1.c1,1998,09 2:30:00,27 ,       0,       0,       0,       0
sgpcmbeC1.c1,1998,09 3:30:00,27 ,       0,0.121428,0.004497,0.023369
sgpcmbeC1.c1,1998,09 4:30:00,27 ,       0,       0,       0,       0
sgpcmbeC1.c1,1998,09 5:30:00,27 ,       0,       0,       0,       0
sgpcmbeC1.c1,1998,09 6:30:00,28 ,0.900026,46.86266,25.56198,12.91865
sgpcmbeC1.c1,1998,09 7:30:00,28 ,35.02278,221.5421,150.5218,54.52232
sgpcmbeC1.c1,1998,09 8:30:00,28 ,6.814096,426.2944,321.7508,106.8953
sgpcmbeC1.c1,1998,09 9:30:00,28 ,13.24471,614.4203,  474.32,157.1223
sgpcmbeC1.c1,1998,0910:30:00,28 ,85.88558,765.2938,588.4937,203.5112
sgpcmbeC1.c1,1998,0911:30:00,28 ,44.24229,857.5966,663.5273,215.5571
sgpcmbeC1.c1,1998,0912:30:00,28 ,132.4073,888.5427,712.5329,185.3742
sgpcmbeC1.c1,1998,0913:30:00,28 ,134.6488,851.8486,662.9265,186.0868
sgpcmbeC1.c1,1998,0914:30:00,28 ,114.6622,758.0725,549.4699,181.3825
sgpcmbeC1.c1,1998,0915:30:00,28 ,118.0717,606.8561,422.7461,149.6237
sgpcmbeC1.c1,1998,0916:30:00,28 ,80.89335,426.6303,295.0804,96.81435
sgpcmbeC1.c1,1998,0917:30:00,28 ,17.03889,218.9926,129.9151,60.58057
sgpcmbeC1.c1,1998,0918:30:00,28 ,       0,46.11896,17.47576,14.24809
sgpcmbeC1.c1,1998,0919:30:00,28 ,       0,0.311663,0.011131,0.058899
sgpcmbeC1.c1,1998,0920:30:00,27 ,       0,0.075666,0.002802,0.014562
sgpcmbeC1.c1,1998,0921:30:00,27 ,       0,       0,       0,       0
sgpcmbeC1.c1,1998,0922:30:00,27 ,       0,0.206196,0.007637,0.039682
sgpcmbeC1.c1,1998,0923:30:00,26 ,       0,       0,       0,       0