eRTG3D

0.7.0

Empirically Informed Random Trajectory Generation in 3-D

0packages depend

3.3Kdownloads / year

90.1%test coverage

11/13checks pass

Overview

About

Maintained by Merlin UnterfingerFirst published 2019-09-194 releasesCRAN page ↗GitHub ↗

Creates realistic random trajectories in a 3-D space between two given fix points, so-called conditional empirical random walks (CERWs). The trajectory generation is based on empirical distribution functions extracted from observed trajectories (training data) and thus reflects the geometrical movement characteristics of the mover. A digital elevation model (DEM), representing the Earth's surface, and a background layer of probabilities (e.g. food sources, uplift potential, waterbodies, etc.) can be used to influence the trajectories. Unterfinger M (2018). "3-D Trajectory Simulation in Movement Ecology: Conditional Empirical Random Walk". Master's thesis, University of Zurich. https://www.geo.uzh.ch/dam/jcr:6194e41e-055c-4635-9807-53c5a54a3be7/MasterThesis_Unterfinger_2018.pdf. Technitis G, Weibel R, Kranstauber B, Safi K (2016). "An algorithm for empirically informed random trajectory generation between two endpoints". GIScience 2016: Ninth International Conference on Geographic Information Science, 9, online. doi:10.5167/uzh-130652.

Install

R (CRAN)pak (dev)Ubuntu (r2u)Fedora (COPR)openSUSE (OBS)

install.packages("eRTG3D", repos = "https://cloud.r-project.org/")

Installs the current CRAN release. Prebuilt binaries on Windows and macOS.

if (!requireNamespace("pak", quietly = TRUE))
  install.packages("pak", repos = "https://cloud.r-project.org/")
pak::pak("munterfi/eRTG3D")

Development version from munterfi/eRTG3D. Installs pak first if it is not already available.

Release

# enable cranapt (r2u) if it is not already set up, then install
grep -rqs r2u.stat.illinois.edu /etc/apt/sources.list /etc/apt/sources.list.d/ \
  || curl -fsSL https://raw.githubusercontent.com/eddelbuettel/r2u/master/inst/scripts/add_cranapt_noble.sh | sudo bash
sudo apt install -y r-cran-ertg3d

Fast Ubuntu binaries via r2u (no compilation). The cranapt setup runs once and is skipped when it is already enabled.

bspm (used by r2u) also needs make: sudo apt install make

# enable the iucar/cran COPR if it is not already present, then install
ls /etc/yum.repos.d/*iucar*cran*.repo >/dev/null 2>&1 \
  || sudo dnf copr enable -y iucar/cran
sudo dnf install -y R-CRAN-eRTG3D

RPMs from the iucar/cran COPR, rebuilt from CRAN.

For install.packages() integration in R, also: sudo dnf install R-CoprManager

# add the autoCRAN OBS repo (Tumbleweed) if it is missing, then install
zypper -q lr | grep -qi autoCRAN \
  || sudo zypper addrepo https://download.opensuse.org/repositories/devel:/languages:/R:/autoCRAN/openSUSE_Tumbleweed/devel:languages:R:autoCRAN.repo
sudo zypper install -y R-eRTG3D

RPMs auto-built from CRAN on openSUSE OBS (Tumbleweed).

Health

CRAN checks

2NOTE11OK

Failing flavors

NOTE r-devel-linux-x86_64-debian-clang
NOTE r-devel-linux-x86_64-debian-gcc

Slowest check: 10.1 min · r-devel-linux-x86_64-fedora-clang

Code health

Yes

Tests · ratio 0.12

90.1%

Coverage · measured lines

76%

Documentation · exports

Dependencies · direct

Check history

NOTE2026-06-09
11 OK · 2 NOTE · 0 WARNING · 0 ERROR · 0 FAILURE
ERROR2026-06-08
11 OK · 1 NOTE · 0 WARNING · 1 ERROR · 0 FAILURE
NOTE2026-03-10
12 OK · 2 NOTE · 0 WARNING · 0 ERROR · 0 FAILURE

Documentation

READMEYes · 394 wordsVignettesYes · dynamicpkgdown siteNoNEWSYes · 100% structuredCode of conductNoContributing guideNo

Examples that run: 98%
Documented parameters: 100%
Return-value docs: 100%
References docs: 4%

Downloads

3.3K

CRAN downloads in the past year

Rank #12,603 · ~9/day · ~275/mo

Releases R versions

Daily download trend is not available in this view yet.

25630 days

84990 days

3.3K1 year

Compare downloads with other packages →

Also on102 r2u31 autocran

Repository

GitHub ↗ munterfi/ertg3d

6Stars

2Forks

0Open issues

0Open PRs

11Releases

197Commits

2Contributors

movement-ecologymachine-learningrandom-walktrajectory-generation3dsimulationrandom-trajectory-generatorbirds

License GPL-3.0 · 197 commits · Last activity 2022-02-23

Stars over time

2025-01-09 · 62026-07-07 · 6

Repository practices

Upstream repositoryBeta

3 development-tooling and community-health practices detected across 3 families in the upstream repository

Checks run against github.com/munterfi/ertg3d on 2026-07-19.

Continuous integration (1)

GitHub Actions

Lint, format, editor (1)

RStudio project

Coverage (1)

Codecov

How this is detected·Detection ruleset v1 (2026-07-18)

Dependencies

Declared dependencies

16 external dependencies (excludes base and recommended)

Depends (1)

R >= 3.5.0

Imports (7)

CircStats ggplot2 pbapply plotly raster rasterVis tiff

LinkingTo (0)

none

Suggests (9)

knitr pander gridExtra plyr rmarkdown sf sp testthat covr

Enhances (0)

none

Dependency license breakdown →

Reverse dependencies

0direct

0indirect

Nothing depends on this yet.

Code & Tests

Code Composition

R 3,272 (61%)Rd 1,563 (29%)Vignettes 487 (9%)

Code characteristics

Cyclomatic complexity: 3.0 median / 25 max
Test cases: 20 / 0.12 per code line

Test coverage

Line coverage

90%

Expression

89.1%

Tests / Examples

90.1% / 56% ex

Functions

58 55 exported

Complexity

4.2 avg / 25 max

Call network

58 nodes / 89 edges

Call graph

Open call graph →

Loading call graph…

Lowest coverage

58 functions

Function	Cyclo	Coverage
.is.df.xyz exp	4	0%
.move2sf.3d exp	2	0%
.setUpPSOCKcluster	3	0%
.check.extent exp	6	60%
.df2sf.3d exp	2	67%
.matrix2sf.3d exp	2	67%

Datasets

Bundled datasets · 1

Name	Class	Rows × Cols	Also ships in
niclas	data.frame	31 × 3	–

People & History

People (4)

Maintainer (1)

Merlin Unterfinger

Author, Maintainer

Authors (1)

Merlin Unterfinger

Author, Maintainer

Contributors (2)

Kamran Safi

Contributor, Thesis advisor

George Technitis

Contributor, Thesis advisor

Other (1)

Robert Weibel

Thesis advisor

Package Timeline

4 releases. Pick two to compare their code metrics. R releases are shown for context.

R
R 4.6.0 released · 2026-04-24
R
R 4.5.0 released · 2025-04-11
R
R 4.4.0 released · 2024-04-24
R
R 4.3.0 released · 2023-04-21
R
R 4.2.0 released · 2022-04-22
0.7.0Latest
2022-02-25 · current release · diff ↗
unarchivedReturned to CRAN
2022-02-25
archivedRemoved from CRAN
2022-02-15
check problems were not corrected in time
0.6.4
2021-10-02 · diff ↗
R
R 4.1.0 released · 2021-05-18
0.6.3
2020-07-27 · diff ↗
R
R 4.0.0 released · 2020-04-24
0.6.2
2019-09-19
R
R 3.6.0 released · 2019-04-26

Package metadata

First published: 2019-09-19
Total releases: 4 / 7 yrs
License: GPL-3 OSI
Minimum R: ≥ 3.5.0
Bundled data: 624 KB / 2 files
Download size: 1.0 MB
Installed size: not tracked yet
With dependencies: not tracked yet

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