Table 1 Statistical summary of fitting function parameters.
Type of fitting function | \(A_{1}\) | \(A_{2}\) | \(x_{0}\) | \(p\) | R2 | Note |
|---|---|---|---|---|---|---|
\(\begin{gathered} {\text{Logistic:}} \hfill \\ y = A_{2} + \frac{{A_{1} - A_{2} }}{{1 + \left( {\frac{x}{{x_{0} }}} \right)^{p} }} \hfill \\ \end{gathered}\) | 5.4 | 4.3 | 757 | 1.3 | 0.63 | All data |
178 | 112.9 | 36.3 | 8.1 | 0.91 | Medium sandstone | |
9.3 | 77.1 | 9.5 | 2.6 | 0.80 | Mudstone | |
10 | 102.4 | 15.2 | 1.9 | 0.84 | Sandy mudstone | |
22.1 | 32.2 | 16.6 | 4.5 | 0.82 | Packsand | |
77 | 162.8 | 21.1 | 11.4 | 0.91 | Packsand | |
9.5 | 31.1 | 15.7 | 14.1 | 0.91 | Grouted rock |
