Figure 10
The horizontal axis, Fourier number, F o, uses a logarithmic scale from 10 to the power of minus 4 to 10 to the power of 3. The vertical axis, phi, ranges from 0.0 to just above 3.0. Diamond markers represent real wall and outlet values, while star markers represent predicted values. The twenty-fifth percentile panel has a mean absolute error, M A E, of 0.037. All four series remain near 0 at low Fourier numbers, then rise to about 2.3 for the wall and 2.5 to 2.6 for the outlet. The fiftieth percentile panel has an M A E of 0.049. The wall series rises to about 2.7, while the outlet series reaches about 3.0. The seventy-fifth percentile panel has an M A E of 0.070. The outlet series rises earlier and reaches about 2.9 to 3.1, while the wall series remains lower and ends near 1.9 to 2.1. Predicted values closely follow the corresponding real values in all three panels.Real vs predicted g-function for samples at the 25th, 50th and 75th percentile of the RMSE