R Observatory: Metrics for CDSim version 0.1.2

Balamuta, James Joseph

doi:10.5281/zenodo.21843040

CDSim

0.1.2Package record

Simulating Climate Data for Research and Modelling

0packages depend

3.2Kdownloads / year

27.4%test coverage

13/13flavors OK

Overview

About

Maintained by Isaac OseiCRAN page ↗GitHub ↗Issues ↗

Generate synthetic station-based monthly climate time-series including temperature and rainfall, export to Network Common Data Form (NetCDF), and provide visualization helpers for climate workflows. The approach is inspired by statistical weather generator concepts described in Wilks (1999) doi:10.1016/S0168-1923(99)00037-4 and Richardson (1981) doi:10.1029/WR017i001p00182.

Changes in 0.1.2

Major improvements

Revised climate simulation engine (simulate_climate_series()):
Replaced the previous implementation with a more physically consistent stochastic framework.
Improved representation of seasonality, temporal persistence (AR(1)), and long-term trends.
Introduced bounded temperature generation using truncated normal (Tmin) and gamma-based perturbation (Tmax).
Enhanced rainfall modelling using a first-order Markov chain for occurrence and gamma-distributed intensity.
Added rainfall–temperature coupling, ensuring realistic negative dependence between precipitation and maximum temperature.
Enforced diurnal consistency constraint (Tmax > Tmin) after rounding.

Enhancements

Improved statistical realism of simulated outputs:
More realistic skewness in rainfall distributions.
Better alignment of autocorrelation structure with climatological expectations.

Show all changes in 0.1.2Hide the rest of the changes in 0.1.2

Strengthened cross-variable relationships (temperature–rainfall coupling).
Updated internal validation workflow:
validate_climate_internal() now performs more robust checks on:
physical constraints
distributional properties
temporal autocorrelation
trend behavior
seasonal patterns

From NEWS.md in the release

Install

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

install.packages("CDSim", 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("ikemillar/CDSim")

Development version from ikemillar/CDSim. 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-cdsim

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-CDSim

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

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

Health

CRAN checks

13OK

CRAN check page ↗

Slowest check: 2.4 min · r-release-macos-x86_64

Status changes

OK13 OK2026-08-05
NOTE12 OK, 1 NOTE2026-08-01
OK14 OK2026-03-10

Advisories

none known

How this is measured·How advisories are found

Documentation

In release 0.1.2

READMEYes · 57 wordsVignettesYes · 1 · dynamicNEWSYes · 67% structured · mentions 0.1.2Citation fileNoWebsitenot declared in DESCRIPTION

Help pages: 10includes a package overview page
Examples that run: 100%5 run in a plain check
Exported functions with examples: 63%
Documented parameters: 100%
Return-value docs: 100%
Help pages citing references: 0%

Vignettes (1)

Getting Started with CDSim HTML

How these are measured

Downloads

3.2K

CRAN downloads in the past year

Rank #11,253 · ~9/day · ~268/mo

Releases R versions

Daily download trend is not available in this view yet.

33230 days

95390 days

3.2K1 year

Compare downloads with other packages →

Also on272 r2u

How downloads are counted

Repository

ikemillar/cdsim ↗Account: ikemillar

0Stars

0Forks

0Open issues

0Open PRs

1Releases

5Commits

1Commit identities

5 commits · Last activity 2026-04-22

Responsiveness

not measured

Releases over time

2026-04-22 · 12026-07-07 · 1

How these are measured

PracticesBeta

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

Checks run against github.com/ikemillar/cdsim on 2026-10-21.

Docs source (1)

pkgdown

CRAN release process (2)

cran-comments.mdCRAN-SUBMISSION

Lint, format, editor (1)

RStudio project

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

Dependencies

Declared dependencies

14 external dependencies (excludes base and recommended)

Installing CDSim adds 47 packages (28 with compiled code, 34 MB of source tarballs). Heaviest: stringi 11 MB, ggplot2 6.0 MB, Rcpp 1.8 MB.

Depends (0)

none

Imports (12)

trend truncnorm ncdf4 lubridate readr dplyr ggplot2 rlang tidyr vroom tibblestats

LinkingTo (0)

none

Suggests (3)

testthat knitr rmarkdown

Enhances (0)

none

Dependency license breakdown →

Reverse dependencies

0direct

0indirect

Nothing depends on this yet.

How these are counted

Code & Tests

People & History

People (2)

Isaac Osei

Author, Maintainer since 0.1.1 (2025)

Acheampong Baafi-Adomako

Author

Listed in earlier versions (1)

Sivaparvathi Dusari

no longer listed · 0.1.1

Releases (2)

Pick two releases to compare their code metrics.

R
R 4.6.0 released · 2026-04-24
0.1.2Latest
record
2026-04-22 · current release · diff ↗ ·
added 2 exports
validate_climate, validate_climate_internal
0.1.1
record
2025-12-15
R
R 4.5.0 released · 2025-04-11

Package metadata

First published: 2025-12-15
Total releases: 2 / 1 yrs
License: MIT + file LICENSE OSI
Download size: 1.1 MB

Cite

Cite this package

Run in R for the authors' preferred citation:

citation("CDSim")

Format

Osei, I., & Baafi-Adomako, A. (2026). CDSim: Simulating Climate Data for Research and Modelling (Version 0.1.2) [Computer software]. https://doi.org/10.32614/CRAN.package.CDSim

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 CDSim version 0.1.2 [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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