R Observatory: Metrics for ccrtm version 0.1.6

Balamuta, James Joseph

doi:10.5281/zenodo.21843040

ccrtm

0.1.6Package record

Coupled Chain Radiative Transfer Models

0packages depend

3.1Kdownloads / year

–test coverage

13/13flavors OK

Overview

About

Maintained by Marco D. VisserCRAN page ↗GitHub ↗Issues ↗

A set of radiative transfer models to quantitatively describe the absorption, reflectance and transmission of solar energy in vegetation, and model remotely sensed spectral signatures of vegetation at distinct spatial scales (leaf,canopy and stand). The main principle behind ccrtm is that many radiative transfer models can form a coupled chain, basically models that feed into each other in a linked chain (from leaf, to canopy, to stand, to atmosphere). It allows the simulation of spectral datasets in the solar spectrum (400-2500nm) using leaf models as PROSPECT5, 5b, and D which can be coupled with canopy models as 'FLIM', 'SAIL' and 'SAIL2'. Currently, only a simple atmospheric model ('skyl') is implemented. Jacquemoud et al 2008 provide the most comprehensive overview of these models doi:10.1016/j.rse.2008.01.026.

Install

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

install.packages("ccrtm", 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("MarcoDVisser/ccrtm")

Development version from MarcoDVisser/ccrtm. 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-ccrtm

Fast Ubuntu binaries via r2u (no compilation). The cranapt setup runs once and is skipped when it is already enabled. We list this channel from recorded r2u download activity rather than from a live index of the repository, so treat it as last known rather than guaranteed.

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-ccrtm

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-ccrtm

RPMs auto-built from CRAN on openSUSE OBS (Tumbleweed). We list this channel from recorded autoCRAN download activity rather than from a live index of the repository, so treat it as last known rather than guaranteed.

Health

CRAN checks

13OK

CRAN check page ↗

Slowest check: 3.2 min · r-devel-windows-x86_64

Status changes

OK13 OK2026-08-05
NOTE12 OK, 1 NOTE2026-08-01
OK14 OK2026-04-22
ERROR13 OK, 1 ERROR2026-04-18
OK14 OK2026-03-10

Advisories

none known

How this is measured·How advisories are found

Documentation

In release 0.1.6

READMENoVignettesNoNEWSNoCitation fileNoWebsitenot declared in DESCRIPTION

Help pages: 23includes a package overview page
Examples that run: 100%5 run in a plain check
Exported functions with examples: 42%
Documented parameters: 100%
Return-value docs: 100%
Help pages citing references: 30%

How these are measured

Downloads

3.1K

CRAN downloads in the past year

Rank #14,381 · ~8/day · ~258/mo

Releases R versions

Daily download trend is not available in this view yet.

27530 days

83290 days

3.1K1 year

Compare downloads with other packages →

Also on358 r2u10 autocran

How downloads are counted

Repository

marcodvisser/ccrtm ↗Account: MarcoDVisser

16Stars

3Forks

1Open issues

0Open PRs

0Releases

519Commits

1Commit identities

519 commits · Last activity 2025-03-12 · 0% stars, 30d · Default branch at 0.4.1, ahead of CRAN 0.1.6 (checked 2026-10-22)

Responsiveness

How these are sampled

PRs merged (all time): not measured
Median days to close, 50 most recently updated closed issues: 687
Median days to close, 50 most recently updated closed PRs: not measured

Stars over time

2025-03-29 · 162026-07-07 · 16

How these are measured

PracticesBeta

Checks run against github.com/marcodvisser/ccrtm on 2026-10-22.

No development-tooling practices detected in the upstream repository.

How this is detected·Detection ruleset v4 (2026-10-20)

Dependencies

Declared dependencies

5 external dependencies (excludes base and recommended)

Installing ccrtm adds 27 packages (13 with compiled code, 8.9 MB of source tarballs). Heaviest: Rcpp 1.8 MB, fs 1.4 MB, jsonlite 1.0 MB.

Depends (1)

R >= 3.5.0

Imports (7)

graphicsgrDevicesstatstestthat Rcpp expint pracma

LinkingTo (1)

Rcpp

Suggests (0)

none

Enhances (0)

none

Dependency license breakdown →

Reverse dependencies

0direct

0indirect

Nothing depends on this yet.

How these are counted

Code & Tests

Datasets

People & History

People (1)

Marco D. Visser

Author, Maintainer since 0.1.6 (2021)

Releases (1)

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
R
R 4.1.0 released · 2021-05-18
0.1.6Latest
record
2021-02-26 · current release
R
R 4.0.0 released · 2020-04-24

Package metadata

First published: 2021-02-26
Total releases: 1 / 5 yrs
License: GPL (>= 2) OSI
Minimum R: ≥ 3.5.0
Bundled data: 95 KB / 4 files
Download size: 219 KB

Cite

Cite this package

Run in R for the authors' preferred citation:

citation("ccrtm")

Format

Visser, M. D. (2021). ccrtm: Coupled Chain Radiative Transfer Models (Version 0.1.6) [Computer software]. https://doi.org/10.32614/CRAN.package.ccrtm

This package has no citation file, so citation() returns this entry built from DESCRIPTION.

Cite the R Observatory

For a number measured here: a download total, a coverage figure, an archival date.

Format

APA

Balamuta, J. J. (2026). R Observatory: Metrics for ccrtm version 0.1.6 [Data set]. HJJB, LLC. Data release v2026-10-25. https://doi.org/10.5281/zenodo.21843040

From data release v2026-10-25, which the citation names so these numbers can be found later. More on citing and the projects behind them.

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