Implements the 'CKNNRLD' algorithm (Clustering-Based K-Nearest
Neighbor Regression for Longitudinal Data) for improving K-Nearest
Neighbor ('KNN') regression on longitudinal data through cluster-based
partitioning and localized prediction. Offers enhanced computational
efficiency and accuracy for high-volume longitudinal datasets. The
acronym 'KNN' stands for K-Nearest Neighbor. References: Loeloe MS,
Tabatabaei SM, Sefidkar R, Mehrparvar AH, Jambarsang S (2025).
"Boosting K-nearest neighbor regression performance for longitudinal
data through a novel learning approach." BMC Bioinformatics, 26, 232.