Efficient Neighborhood Basal Area Metrics for Trees R package calba version 0.1.2 Fast 'C++'-backed tools for computing conspecific and total neighborhood basal area in mapped forest plots. Includes unweighted and distance-weighted neighborhoods, multiple radii, decay kernels, and basic edge correction. Outputs are model-ready covariates for forest competition, growth, and survival models, following neighborhood modeling workflows commonly used in spatial ecology (e.g., Hülsmann et al. 2024 <doi:10.1038/s41586-024-07118-4>). Software Imports: Rcpp LinkingTo: Rcpp Suggests: testthat (>= 3.1.0), knitr, rmarkdown, ggplot2 Masatoshi Katabuchi <mattocci27@gmail.com> Comprehensive R Archive Network (CRAN) Masatoshi Katabuchi [aut, cre] GPL-3 2025-12-18 application/tgz https://CRAN.R-project.org/package=calba doi:10.32614/CRAN.package.calba