SVARtca

1.0.2

Transmission Channel Analysis in Structural VAR Models

0packages depend

1.4Kdownloads / year

68.7%test coverage

13/13checks pass

Overview

About

Maintained by Muhammad AlkhalafFirst published 2026-04-091 releasesCRAN page ↗GitHub ↗

Implements Transmission Channel Analysis (TCA) for structural vector autoregressive (SVAR) models following the methodology of Wegner, Lieb, and Smeekes (2025) doi:10.48550/arXiv.2405.18987. TCA decomposes impulse response functions (IRFs) into contributions from distinct transmission channels using a systems form representation and directed acyclic graph (DAG) path analysis. Supports overlapping channels, exhaustive 3-way and 4-way decompositions via inclusion-exclusion principle. This is a parallel R implementation of the 'tca-matlab-toolbox' (https://github.com/enweg/tca-matlab-toolbox).

Install

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

install.packages("SVARtca", 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("muhammedalkhalaf/SVARtca")

Development version from muhammedalkhalaf/SVARtca. 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-svartca

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-SVARtca

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-SVARtca

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

Health

CRAN checks

13OK

Slowest check: 2.4 min · r-devel-linux-x86_64-fedora-clang

Code health

Yes

Tests · ratio 0.22

68.7%

Coverage · measured lines

100%

Documentation · exports

Dependencies · direct

Check history

OK2026-04-09
6 OK · 0 NOTE · 0 WARNING · 0 ERROR · 0 FAILURE

Documentation

READMENoVignettesNopkgdown siteNoNEWSYes · 67% structuredCode of conductNoContributing guideNo

Examples that run: 75%
Documented parameters: 100%
Return-value docs: 100%
References docs: 38%

Downloads

1.4K

CRAN downloads in the past year

Rank #9,715 · ~4/day · ~116/mo

Releases R versions

Daily download trend is not available in this view yet.

22130 days

1.1K90 days

1.4K1 year

Compare downloads with other packages →

Also on22 r2u9 autocran

Repository

GitHub ↗ muhammedalkhalaf/svartca

1Stars

1Forks

0Open issues

0Open PRs

2Releases

8Commits

1Contributors

8 commits · Last activity 2026-04-28

Repository practices

Upstream repositoryBeta

3 development-tooling and community-health practices detected across 2 families in the upstream repository

Checks run against github.com/muhammedalkhalaf/svartca on 2026-07-19.

CRAN release process (1)

cran-comments.md

Research and citation (2)

JOSS paperZenodo

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

Dependencies

Declared dependencies

6 external dependencies (excludes base and recommended)

Depends (1)

R >= 3.5.0

Imports (3)

Matrixggplot2 rlang

LinkingTo (0)

none

Suggests (4)

testthat knitr rmarkdown vars

Enhances (0)

none

Dependency license breakdown →

Reverse dependencies

0direct

0indirect

Nothing depends on this yet.

Code & Tests

Code Composition

R 981 (73%)Rd 372 (27%)

Code characteristics

Object systems

S31

Cyclomatic complexity: 3.0 median / 13 max
Test cases: 11 / 0.22 per code line

Test coverage

Line coverage

69%

Expression

65.8%

Tests / Examples

68.7% / 64% ex

Functions

19 6 exported

Complexity

4.1 avg / 13 max

Call network

19 nodes / 22 edges

Call graph

Open call graph →

Loading call graph…

Lowest coverage

19 functions

Function	Cyclo	Coverage
tca_from_var exp	13	0%
applyAndToB	3	0%
computeMA	4	0%
print.tca_result	5	0%
tca_validate_additivity exp	7	69%
transmissionEffect	4	69%

People & History

People (4)

Maintainer (1)

Muhammad Alkhalaf

Author, Maintainer

Authors (1)

Muhammad Alkhalaf

Author, Maintainer

Contributors (3)

Lenard Lieb

Contributor

Stephan Smeekes

Contributor

Emanuel Wegner

Contributor

Package Timeline

1 release. R releases are shown for context.

R
R 4.6.0 released · 2026-04-24
1.0.2Latest
2026-04-09 · current release
R
R 4.5.0 released · 2025-04-11

Package metadata

First published: 2026-04-09
Total releases: 1 / 1 yrs
License: MIT + file LICENSE OSI
Minimum R: ≥ 3.5.0
Download size: not tracked yet
Installed size: not tracked yet
With dependencies: not tracked yet

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