absmax absmax apply_mask cast compute_magnitude compute_range diff_x diff_x_p diff_y diff_y_p extract_surface extract_surface global_to_local int_to_normtype interpolate Kind max min set_default_value_or_stop staggered_to_regular staggered_to_regular sum sum_columns

diff_x_p() double pism::array::diff_x_p ( const array::Scalar &  array, int  i, int  j  ) Returns the x-derivative at i,j approximated using centered finite differences. Respects grid periodicity and uses one-sided FD at grid edges if necessary. Definition at line 108 of file Scalar.cc. References diff_x(), pism::array::Array::grid(), and pism::grid::X_PERIODIC. Referenced by pism::stressbalance::PSB_wvel::compute(), pism::stressbalance::SSA::compute_driving_stress(), pism::stressbalance::SSB_taud::compute_impl(), pism::stressbalance::PSB_tauxz::compute_impl(), and pism::stressbalance::WeertmanSliding::update().