//! Leave-one-out cross-validation for IDW, ordinary kriging, and cokriging.
//!
//! Evaluates IDW/kriging and collocated/ICM/LMC cokriging accuracy (MAE, RMSE,
//! R2) on the same source dataset, plus [`select_best_model`] to pick the
//! statistically better method from either result.
pub use ;