R Observatory: Metrics for BTWAR version 1.0.1

Balamuta, James Joseph

doi:10.5281/zenodo.21843040

BTWAR

1.0.1Package record

Butterworth-Induced Autoregressive Model

0packages depend

3Kdownloads / year

0.0%test coverage

13/13flavors OK

Overview

About

Maintained by Carlos Bras-GeraldesCRAN page ↗GitHub ↗Issues ↗

Implements the Butterworth-Induced Autoregressive ('BTWAR') model, where autoregressive coefficients are obtained from analog Butterworth filter prototypes mapped into the discrete-time domain using the Matched Z-Transform. The framework establishes a structured connection between frequency-domain filter design and time-domain autoregressive modeling. Model order selection is performed via nested rolling-origin cross-validation. Method described in Bras-Geraldes, Rocha and Martins (2026) doi:10.3390/math14030479.

Changes in 1.0.1

Bug fixes

Fixed a bug in plot_bode() where the frequency axis was linearly spaced instead of log-spaced, causing distortion on the logarithmic scale.

New features

Added plot_freq_amplitude() to display the frequency amplitude spectrum of a time series with reference lines at the cutoff and Nyquist frequencies.

Documentation

Fixed example in poles_AR() where fit object was not defined.
Updated all plot function examples to use simulate_ar_split() for consistency with the vignette.
Removed set.seed() calls from examples.
Replaced all \dontrun{} with \donttest{} throughout the package.

Show all changes in 1.0.1Hide the rest of the changes in 1.0.1

Added DOI reference in DESCRIPTION.
Removed single quotes from non-software terms in DESCRIPTION.

From NEWS.md in the release

Install

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

install.packages("BTWAR", 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("cgeraldes/BTWAR")

Development version from cgeraldes/BTWAR. 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-btwar

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-BTWAR

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-BTWAR

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: 2.3 min · r-oldrel-windows-x86_64

Status changes

OK13 OK2026-08-05
NOTE12 OK, 1 NOTE2026-08-01
OK5 OK2026-03-20

Advisories

none known

How this is measured·How advisories are found

Documentation

In release 1.0.1

READMENoVignettesYes · 1 · dynamicNEWSYes · 100% structured · mentions 1.0.1Citation fileYes · cites a publicationWebsitenot declared in DESCRIPTION

Help pages: 20
Examples that run: 62%8 run in a plain check · 5 only when donttest examples are enabled (R CMD check --as-cran)
Exported functions with examples: 100%
Documented parameters: 99%
Return-value docs: 100%
Help pages citing references: 0%

Vignettes (1)

Introduction to the BTWAR Package HTML

How these are measured

Downloads

3K

CRAN downloads in the past year

Rank #10,988 · ~8/day · ~249/mo

Releases R versions

Daily download trend is not available in this view yet.

39430 days

94990 days

3K1 year

Compare downloads with other packages →

Also on48 r2u11 autocran

How downloads are counted

Repository

cgeraldes/btwar ↗Account: cgeraldes

0Stars

0Forks

0Open issues

0Open PRs

1Releases

26Commits

1Commit identities

26 commits · Last activity 2026-03-15

Responsiveness

How these are sampled

PRs merged (all time): 100%
Median days to close, 50 most recently updated closed issues: not measured
Median days to close, 50 most recently updated closed PRs: 0

Releases over time

2026-03-15 · 12026-07-07 · 1

How these are measured

PracticesBeta

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

Checks run against github.com/cgeraldes/btwar on 2026-10-11.

Continuous integration (1)

GitHub Actions

CRAN release process (2)

cran-comments.mdCRAN-SUBMISSION

Lint, format, editor (1)

RStudio project

Git structural (1)

.gitattributes

How this is detected·Detection ruleset v3 (2026-09-26)

Dependencies

Declared dependencies

7 external dependencies (excludes base and recommended)

Installing BTWAR adds 26 packages (14 with compiled code, 18 MB of source tarballs). Heaviest: ggplot2 6.0 MB, isoband 1.5 MB, farver 1.2 MB.

Depends (1)

R >= 3.5.0

Imports (4)

ggplot2 pracma tseries scales

LinkingTo (0)

none

Suggests (3)

knitr rmarkdown spelling

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)

Carlos Bras-Geraldes

J. Leonel Rocha

Author, Copyright holder

Releases (1)

R
R 4.6.0 released · 2026-04-24
1.0.1Latest
record
2026-03-19 · current release
R
R 4.5.0 released · 2025-04-11

Package metadata

First published: 2026-03-19
Total releases: 1 / 1 yrs
License: GPL-3 OSI
Minimum R: ≥ 3.5.0
Download size: 309 KB

Cite

Cite this package

Run in R for the authors' entry:

citation("BTWAR")

The package provides a citation file, so citation() returns the authors' own entry.

It points to 10.3390/math14030479.

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 BTWAR version 1.0.1 [Data set]. HJJB, LLC. Data release v2026-10-19. https://doi.org/10.5281/zenodo.21843040

From data release v2026-10-19, which the citation names so these numbers can be found later. More on citing and the projects behind them.

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