Distance-sampling analyses (<doi:10.1007/978-3-319-19219-2>) estimate density and abundance of survey targets (e.g., animals) when detection declines with distance. Distance-sampling is popular ecology, especially when survey targets are observed from aerial platforms (e.g., airplane or drone), surface vessels (e.g., boat or truck), or along walking transects. Both point and line transects can be analyzed. Outputs include overall (study area) density and abundance, effective sampling distances, and model fit statistics. A large suite of classical, parametric detection functions (e.g., half-normal, hazard rate) is included along with uncommon parametric functions (e.g., Gamma, negative exponential). Non-parametric smoothed distance functions are included. Measurement unit integrity is enforced via internal unit conversion. The help files and vignettes have been vetted by multiple authors and tested in workshop settings.
| Version: | 3.1.4 |
| Depends: | R (≥ 3.5.0) |
| Imports: | graphics, stats, utils, units, crayon |
| Suggests: | knitr, rmarkdown, testthat (≥ 3.0.0), devtools |
| Published: | 2025-03-11 |
| DOI: | 10.32614/CRAN.package.Rdistance |
| Author: | Trent McDonald [cre, aut], Jason Carlisle [aut], Aidan McDonald [aut] (point transect methods), Ryan Nielson [ctb] (smoothed likelihood), Ben Augustine [ctb] (maximization method), James Griswald [ctb] (maximization method), Patrick McKann [ctb] (maximization method), Lacey Jeroue [ctb] (vignettes), Hoffman Abigail [ctb] (vignettes), Kleinsausser Michael [ctb] (vignettes), Joel Reynolds [ctb] (Gamma likelihood), Pham Quang [ctb] (Gamma likelihood), Earl Becker [ctb] (Gamma likelihood), Aaron Christ [ctb] (Gamma likelihood), Brook Russelland [ctb] (Gamma likelihood), Stefan Emmons [ctb] (Automated tests), Will McDonald [ctb] (Automated tests), Reid Olson [ctb] (Automated tests and bug fixes) |
| Maintainer: | Trent McDonald <trent at mcdonalddatasciences.com> |
| BugReports: | https://github.com/tmcd82070/Rdistance/issues |
| License: | GPL-2 | GPL-3 [expanded from: GNU General Public License] |
| URL: | https://github.com/tmcd82070/Rdistance/wiki |
| NeedsCompilation: | no |
| Materials: | NEWS |
| CRAN checks: | Rdistance results |
| Reference manual: | Rdistance.pdf |
| Vignettes: |
Rdistance: Extended dfuncEstim Examples (source, R code) Rdistance: Beginner Line Transect Tutorial (source, R code) |
| Package source: | Rdistance_3.1.4.tar.gz |
| Windows binaries: | r-devel: Rdistance_3.0.0.zip, r-release: Rdistance_3.0.0.zip, r-oldrel: Rdistance_3.0.0.zip |
| macOS binaries: | r-devel (arm64): Rdistance_3.0.0.tgz, r-release (arm64): Rdistance_3.0.0.tgz, r-oldrel (arm64): Rdistance_3.0.0.tgz, r-devel (x86_64): Rdistance_3.0.0.tgz, r-release (x86_64): Rdistance_3.0.0.tgz, r-oldrel (x86_64): Rdistance_3.0.0.tgz |
| Old sources: | Rdistance archive |
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