citationchaser

0.0.4

Perform Forward and Backwards Chasing in Evidence Syntheses

0packages depend

3.9Kdownloads / year

–test coverage

9/13checks pass

Overview

About

Maintained by Neal HaddawayFirst published 2022-01-271 releasesCRAN page ↗

In searching for research articles, we often want to obtain lists of references from across studies, and also obtain lists of articles that cite a particular study. In systematic reviews, this supplementary search technique is known as 'citation chasing': forward citation chasing looks for all records citing one or more articles of known relevance; backward citation chasing looks for all records referenced in one or more articles. Traditionally, this process would be done manually, and the resulting records would need to be checked one-by-one against included studies in a review to identify potentially relevant records that should be included in a review. This package contains functions to automate this process by making use of the Lens.org API. An input article list can be used to return a list of all referenced records, and/or all citing records in the Lens.org database (consisting of PubMed, PubMed Central, CrossRef, Microsoft Academic Graph and CORE; https://www.lens.org).

Install

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

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

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

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-citationchaser

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-citationchaser

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

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

Health

CRAN checks

4NOTE9OK

Failing flavors

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

Slowest check: 2.9 min · r-devel-linux-x86_64-fedora-clang

Code health

None

Tests · ratio 0.00

not tracked

Coverage

100%

Documentation · exports

Dependencies · direct

Check history

NOTE2026-06-09
9 OK · 4 NOTE · 0 WARNING · 0 ERROR · 0 FAILURE
ERROR2026-06-08
9 OK · 3 NOTE · 0 WARNING · 1 ERROR · 0 FAILURE
NOTE2026-05-02
9 OK · 4 NOTE · 0 WARNING · 0 ERROR · 0 FAILURE
ERROR2026-04-25
7 OK · 4 NOTE · 0 WARNING · 1 ERROR · 0 FAILURE
NOTE2026-03-10
10 OK · 4 NOTE · 0 WARNING · 0 ERROR · 0 FAILURE

Documentation

READMEYes · 291 wordsVignettesNopkgdown siteNoNEWSNoCode of conductNoContributing guideNo

Examples that run: 0%
Documented parameters: 100%
Return-value docs: 100%
References docs: 0%

Downloads

3.9K

CRAN downloads in the past year

Rank #11,415 · ~11/day · ~324/mo

Releases R versions

Daily download trend is not available in this view yet.

30630 days

93590 days

3.9K1 year

Compare downloads with other packages →

Also on110 r2u24 c2d4u

Dependencies

Declared dependencies

11 external dependencies (excludes base and recommended)

Depends (1)

R >= 2.10

Imports (10)

dplyr httr jsonlite maditr MESS networkD3 scales tibbleutilsdata.table

LinkingTo (0)

none

Suggests (2)

knitr rmarkdown

Enhances (0)

none

Dependency license breakdown →

Reverse dependencies

0direct

0indirect

Nothing depends on this yet.

Code & Tests

Code Composition

R 688 (85%)Rd 123 (15%)

Code characteristics

Cyclomatic complexity: 6.0 median / 38 max

Test coverage

Line coverage

–

Expression

–

Tests / Examples

–

Functions

3 2 exported

Complexity

15 avg / 38 max

Call network

3 nodes / 2 edges

Call graph

Open call graph →

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Lowest coverage

Per-function coverage is not measured for this package yet.

People & History

People (3)

Maintainer (1)

Neal Haddaway

Author, Maintainer

Authors (1)

Neal Haddaway

Author, Maintainer

Contributors (2)

Matthew Grainger

Contributor

Charles Gray

Contributor

Package Timeline

1 release. R releases are shown for context.

R
R 4.6.0 released · 2026-04-24
0.0.4Latest
2026-03-10 · current release
R
R 4.5.0 released · 2025-04-11

Package metadata

First published: 2022-01-27
Total releases: 1 / 4 yrs
License: GPL (>= 3) OSI
Minimum R: ≥ 2.10
Download size: 221 KB
Installed size: not tracked yet
With dependencies: not tracked yet

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