datastream, year, month, tod,n, min, max, mean, std
sgpcmbeC1.c1,1997,11 0:30:00,28 ,       0,0.093635,0.003344,0.017695
sgpcmbeC1.c1,1997,11 1:30:00,28 ,       0,0.156924,0.005604,0.029656
sgpcmbeC1.c1,1997,11 2:30:00,29 ,       0,       0,       0,       0
sgpcmbeC1.c1,1997,11 3:30:00,29 ,       0,       0,       0,       0
sgpcmbeC1.c1,1997,11 4:30:00,29 ,       0,       0,       0,       0
sgpcmbeC1.c1,1997,11 5:30:00,30 ,       0,       0,       0,       0
sgpcmbeC1.c1,1997,11 6:30:00,30 ,       0, 0.76201,0.100831,0.224906
sgpcmbeC1.c1,1997,11 7:30:00,30 ,1.261221,77.66821,29.86349,22.47296
sgpcmbeC1.c1,1997,11 8:30:00,30 ,16.49648,256.9086,129.8493,78.34738
sgpcmbeC1.c1,1997,11 9:30:00,30 ,27.19283, 426.126,247.3181,131.3477
sgpcmbeC1.c1,1997,1110:30:00,30 ,54.12016,564.9651,351.6267,  175.77
sgpcmbeC1.c1,1997,1111:30:00,30 ,84.69667,633.9536,430.0929,184.8464
sgpcmbeC1.c1,1997,1112:30:00,30 ,63.31556,643.9189,427.3147,193.4484
sgpcmbeC1.c1,1997,1113:30:00,30 ,49.86669,592.3352,  390.71,182.5642
sgpcmbeC1.c1,1997,1114:30:00,30 ,34.98638,477.6092,313.9541,149.9159
sgpcmbeC1.c1,1997,1115:30:00,30 , 18.0282,344.4918,201.1472,103.3254
sgpcmbeC1.c1,1997,1116:30:00,30 ,6.203741,  158.52,81.66231,47.04673
sgpcmbeC1.c1,1997,1117:30:00,30 ,       0,18.02253,5.857817,4.906839
sgpcmbeC1.c1,1997,1118:30:00,30 ,       0,       0,       0,       0
sgpcmbeC1.c1,1997,1119:30:00,30 ,       0,       0,       0,       0
sgpcmbeC1.c1,1997,1120:30:00,30 ,       0,0.160875,0.005362,0.029372
sgpcmbeC1.c1,1997,1121:30:00,30 ,       0,0.316109,0.010537,0.057713
sgpcmbeC1.c1,1997,1122:30:00,28 ,       0,0.377419,0.013479,0.071325
sgpcmbeC1.c1,1997,1123:30:00,29 ,       0,       0,       0,       0