R fallback for N-order spatial smoothing

Pure-R implementation matching the C++ algorithm in `process_district_all_vars_n_orders()`. Used automatically by [`smooth_variables()`] when the compiled library is unavailable.

Usage

smooth_variables_r_fallback(
  variable_values,
  neighbors,
  weights,
  hex_indices,
  var_names
)

Arguments

variable_values

List of numeric vectors (one per variable).

neighbors

List of length `n_orders`; each element is a list of length `n_cells` of integer neighbour indices.

weights

List with `center_weight` and `neighbor_weights`.

hex_indices

Integer vector of cell indices (1-based) to process.

var_names

Character vector of variable names.

Value

Named list with one entry per variable, each containing `raw` (the centre cell value), `weighted_combined` (the smoothed value), and `neighbors_<N><suffix>` (per-order neighbour means, e.g. `neighbors_1st`, `neighbors_2nd`, ...).