| |
| #define chkder_log10e 0.43429448190325182765 |
| #define chkder_factor 100. |
| |
| template<typename Scalar> |
| void ei_chkder( |
| Matrix< Scalar, Dynamic, 1 > &x, |
| Matrix< Scalar, Dynamic, 1 > &fvec, |
| Matrix< Scalar, Dynamic, Dynamic > &fjac, |
| Matrix< Scalar, Dynamic, 1 > &xp, |
| Matrix< Scalar, Dynamic, 1 > &fvecp, |
| int mode, |
| Matrix< Scalar, Dynamic, 1 > &err |
| ) |
| { |
| const Scalar eps = ei_sqrt(epsilon<Scalar>()); |
| const Scalar epsf = chkder_factor * epsilon<Scalar>(); |
| const Scalar epslog = chkder_log10e * ei_log(eps); |
| Scalar temp; |
| int i,j; |
| |
| const int m = fvec.size(), n = x.size(); |
| |
| if (mode != 2) { |
| xp.resize(n); |
| /* mode = 1. */ |
| for (j = 0; j < n; ++j) { |
| temp = eps * ei_abs(x[j]); |
| if (temp == 0.) |
| temp = eps; |
| xp[j] = x[j] + temp; |
| } |
| } |
| else { |
| /* mode = 2. */ |
| err.setZero(m); |
| for (j = 0; j < n; ++j) { |
| temp = ei_abs(x[j]); |
| if (temp == 0.) |
| temp = 1.; |
| err += temp * fjac.col(j); |
| } |
| for (i = 0; i < m; ++i) { |
| temp = 1.; |
| if (fvec[i] != 0. && fvecp[i] != 0. && ei_abs(fvecp[i] - fvec[i]) >= epsf * ei_abs(fvec[i])) |
| temp = eps * ei_abs((fvecp[i] - fvec[i]) / eps - err[i]) / (ei_abs(fvec[i]) + ei_abs(fvecp[i])); |
| err[i] = 1.; |
| if (temp > epsilon<Scalar>() && temp < eps) |
| err[i] = (chkder_log10e * ei_log(temp) - epslog) / epslog; |
| if (temp >= eps) |
| err[i] = 0.; |
| } |
| } |
| } /* chkder_ */ |
| |
