R Observatory: Metrics for collapse version 2.1.8

Balamuta, James Joseph

doi:10.5281/zenodo.21843040

collapse

2.1.8Package record

Advanced and Fast Data Transformation

48packages dependsuggested by 18

560.7Kdownloads / year

75.1%test coverage

13/13flavors OK

Overview

About

Maintained by Sebastian KrantzCRAN page ↗GitHub ↗Website ↗Issues ↗

A large C/C++-based package for advanced data transformation and statistical computing in R that is extremely fast, class-agnostic, robust, and programmer friendly. Core functionality includes a rich set of S3 generic grouped and weighted statistical functions for vectors, matrices and data frames, which provide efficient low-level vectorizations, OpenMP multithreading, and skip missing values by default. These are integrated with fast grouping and ordering algorithms (also callable from C), and efficient data manipulation functions. The package also provides a flexible and rigorous approach to time series and panel data in R, fast functions for data transformation and common statistical procedures, detailed (grouped, weighted) summary statistics, powerful tools to work with nested data, fast data object conversions, functions for memory efficient R programming, and helpers to effectively deal with variable labels, attributes, and missing data. It seamlessly supports base R objects/classes as well as 'units', 'integer64', 'xts'/ 'zoo', 'tibble', 'grouped_df', 'data.table', 'sf', and 'pseries'/'pdata.frame'. For a concise overview of the package see Krantz (2026) doi:10.18637/jss.v116.i01.

Changes in 2.1.8

Fixed a bug in setv()/copyv() where assignments into character (STRSXP) or list (VECSXP) vectors bypassed R's generational write barrier, writing element pointers directly instead of using SET_STRING_ELT()/SET_VECTOR_ELT(). This could cause an old-generation target to hold an unrecorded reference to a younger value, which a subsequent young-generation garbage collection could free while still referenced, leading to memory corruption, cryptic CHAR()/SET_STRING_ELT() errors, or segfaults, most likely under heavy allocation in long-running processes. Thanks @SebKrantz for reporting and diagnosing (#876).
Fixed a bug in fmatch() (and thus %in%/%!in%/%iin%/%!iin% and joins) where a logical NA in x could spuriously match a non-NA value in table (e.g. 2L) when table was not itself logical. Thanks @LJ-Jenkins for reporting (#870).
Fixed a bug in fslice() (grouped, n = 1, with.ties = FALSE) that caused R to crash with a fatal error when a group had only missing values in order.by. Thanks @chihyunkim for reporting (#867).

From NEWS.md in the release

Install

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

install.packages("collapse", 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("fastverse/collapse")

Development version from fastverse/collapse. 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-collapse

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-collapse

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-collapse

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: 13.6 min · r-oldrel-windows-x86_64

Status changes

OK13 OK2026-08-05
NOTE12 OK, 1 NOTE2026-08-01
OK12 OK2026-04-25
NOTE11 OK, 3 NOTE2026-04-22
ERROR10 OK, 3 NOTE, 1 ERROR2026-04-18

Show 1 earlier changeHide 1 earlier change

NOTE11 OK, 3 NOTE2026-03-10

Advisories

none known

How this is measured·How advisories are found

Documentation

In release 2.1.8

README· In the repository, left out of the releaseVignettesYes · 5 · dynamicNEWSYes · 100% structured · mentions 2.1.8Citation fileYes · cites a publicationWebsiteYes · pkgdown

Cites a JSS article

Help pages: 82includes a package overview page
Examples that run: 100%73 run in a plain check
Exported functions with examples: 94%
Documented parameters: 85%
Return-value docs: 90%
Help pages citing references: 28%

Vignettes (5)

How these are measured

Downloads

560.7K

CRAN downloads in the past year

Rank #536 · ~1.5K/day · ~46.7K/mo

Releases R versions

Daily download trend is not available in this view yet.

44.1K30 days

129.8K90 days

560.7K1 year

Compare downloads with other packages →

Also on8.3K r2u11 autocran19K conda_forge178 c2d4u

How downloads are counted

Repository

fastverse/collapse ↗Organization: fastverse

708Stars

37Forks

19Open issues

3Open PRs

61Releases

3,540Commits

14Commit identities

rcranrstatsstatisticsdata-sciencescientific-computingtime-seriespanel-data

3,540 commits · Last activity 2026-08-30 · +0.3% stars, 30d · Discussions: 3 posts

Responsiveness

How these are sampled

PRs merged (all time): 94%
Median days to close, 50 most recently updated closed issues: 4
Median days to close, 50 most recently updated closed PRs: 0

Stars over time

2025-10-21 · 6882026-09-30 · 708

How these are measured

PracticesBeta

12 development-tooling and community-health practices detected across 7 families in the upstream repository

Checks run against github.com/fastverse/collapse on 2026-10-18.

Continuous integration (2)

GitHub ActionsR CMD check workflow

The R CMD check workflow runs on Linux, macOS and Windows, and on R-devel

Governance and community (3)

Contributing guideIssue templatesPR template

Docs source (3)

pkgdown

GitHub Pages site last deployed 2026-09-17 · The repository has a site deploy workflow

pkgdown site last built 2026-09-17

Coverage (1)

Coverage reporting (Codecov)

Show all practicesHide 3 practices

Research and citation (1)

CITATION.cff

Lint, format, editor (1)

RStudio project

Git structural (1)

.gitattributes

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

AI coding toolsBeta

This repository shows signs of AI coding tools.

Claude Codefirst seen 2026-03-27
Seen in the repository: CLAUDE.md
Named in .Rbuildignore: .claude, CLAUDE.md
Pull request it wrote: opened by a project member
Commits: 5 by its own account · at least 3 crediting it in the message
Cursorfirst seen 2026-05-17
Pull request it wrote: opened by a project member
Commits: at least 4 crediting it in the message

From outside contributors

Claude Code
Pull requests: 1 from outside contributors, first on 2026-09-23, 1 from forks

Models named in its commits

Claude Sonnet 4.52 commits · May 2026

Counts are commits, not lines of code. Commits by a tool's accounts count once across all of its accounts. Commits crediting it are the largest count among its credit lines, a minimum.How this is detected·Detection ruleset v4 (updated 2026-09-27)

Dependencies

Declared dependencies

24 external dependencies (excludes base and recommended)

Installing collapse adds 1 package (1 with compiled code, 1.8 MB of source tarballs). Heaviest: Rcpp 1.8 MB.

Depends (1)

R >= 4.1.0

Imports (1)

Rcpp

LinkingTo (1)

Rcpp

Suggests (22)

fastverse data.table magrittr kit xts zoo plm fixest vars RcppArmadillo RcppEigen tibble dplyr ggplot2 scales microbenchmark testthat covr knitr rmarkdown withr bit64

Enhances (0)

none

Dependency license breakdown →

Reverse dependencies

48direct

56indirect

Imports 48

Suggested by 18

Show the 48 most downloaded dependentsHide the 48 most downloaded dependents

Depends, Imports or LinkingTo, most downloaded first

and 18 packages that suggest it on CRAN ↗

How these are counted

Code & Tests

Datasets

People & History

People (12)

Sebastian Krantz

Author, Maintainer since 1.0.0 (2020)

R Core Team and contributors worldwide

Contributor

Laurent Berge

Contributor · added in 1.5.0

Alina Cherkas

Contributor · added in 2.1.0

Matt Dowle

Contributor

Dirk Eddelbuettel

Contributor

Morgan Jacob

Contributor · added in 1.7.0

Ivan Krylov

Contributor · added in 2.1.6

Arun Srinivasan

Contributor

Show 1 more contributorHide 1 contributor

Kevin Tappe

Contributor · added in 1.4.2

1999-2016 The R Core Team

Copyright holder

Martyn Plummer

Copyright holder

Listed in earlier versions (2)

Simen Gaure

no longer listed · 1.0.0 to 1.4.2

Josh Pasek

no longer listed · 1.5.0 to 1.7.2

Releases (58)

Pick two releases to compare their code metrics.

2.1.8Latest
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2026-08-30 · current release · diff ↗
2.1.7
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2026-05-19 · diff ↗
R
R 4.6.0 released · 2026-04-24
2.1.6
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2026-01-11 · diff ↗
2.1.5
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2025-11-19 · diff ↗
2.1.4
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2025-10-24 · diff ↗
2.1.3
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2025-08-18 · diff ↗
2.1.2
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2025-05-25 · diff ↗
2.1.1
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2025-04-14 · diff ↗
R
R 4.5.0 released · 2025-04-11
2.1.0
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2025-03-10 · diff ↗ ·
removed 12 exports
as.factor_GRP, as.factor_qG, Date_vars, `Date_vars<-`, is.categorical, is.Date, is.GRP, is.qG, is.unlistable, pwNobs, as.numeric_factor, as.character_factor

added 3 exports
fslice, fslicev, groupv
2.0.19
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2025-01-09 · diff ↗
2.0.18
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2024-11-23 · diff ↗
2.0.17
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2024-11-03 · diff ↗
2.0.16
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2024-08-21 · diff ↗
2.0.15
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2024-07-08 · diff ↗

Show 52 earlier eventsHide 52 earlier events

2.0.14
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2024-05-25 · diff ↗ ·
added 2 exports
group_by_vars, as_integer_factor
R
R 4.4.0 released · 2024-04-24
2.0.13
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2024-04-14 · diff ↗
2.0.12
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2024-04-01 · diff ↗
2.0.11
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2024-03-21 · diff ↗
2.0.10
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2024-02-17 · diff ↗
2.0.9
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2024-01-11 · diff ↗ ·
added 2 exports
na_locf, na_focb
2.0.7
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2023-12-07 · diff ↗ ·
added 2 exports
replace_na, replace_inf
2.0.6
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2023-11-12 · diff ↗
2.0.3
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2023-10-18 · diff ↗
2.0.2
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2023-10-14 · diff ↗ ·
added 8 exports
pivot, vec, join, fmatch, `%iin%`, `%!iin%`, rowbind, .COLLAPSE_OLD
1.9.6
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2023-05-28 · diff ↗
R
R 4.3.0 released · 2023-04-21
1.9.5
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2023-04-07 · diff ↗
1.9.4
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2023-03-31 · diff ↗
1.9.3
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2023-02-27 · diff ↗ ·
added 2 exports
fduplicated, any_duplicated
1.9.2
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2023-01-25 · diff ↗ ·
added 4 exports
plot.psmat, .range, set_collapse, get_collapse
1.9.0
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2023-01-15 · diff ↗ ·
removed 13 exports
F, fNdistinct.data.frame, fNdistinct.default, fNdistinct.matrix, fNobs.data.frame, fNobs.default, fNobs.matrix, fHDbetween.default, fHDbetween.matrix, fHDbetween.data.frame, fHDwithin.default, fHDwithin.matrix, fHDwithin.data.frame

added 8 exports
fsummarize, GRPid, fcount, fcountv, descr.default, fquantile, .quantile, fdist
1.8.9
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2022-10-07 · diff ↗ ·
added 2 exports
rsplit.matrix, setattrib
1.8.8
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2022-08-15 · diff ↗ ·
added 4 exports
all_funs, fFtest.default, flm.default, itn
1.8.6
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2022-06-14 · diff ↗
1.8.5
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2022-06-13 · diff ↗
1.8.4
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2022-06-08 · diff ↗ ·
removed 3 exports
is.regular, Recode, replace_non_finite

added 16 exports
timeid, is_irregular, findex_by, iby, findex, ix, reindex, unindex, to_plm, qtab, qtable, greorder, setTRA, vgcd, frange, fnunique
R
R 4.2.0 released · 2022-04-22
1.7.6
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2022-02-11 · diff ↗ ·
added 1 export
GRPN
1.7.5
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2022-02-03 · diff ↗
1.7.3
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2022-01-26 · diff ↗
1.7.2
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2022-01-23 · diff ↗
1.7.0
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2022-01-14 · diff ↗ ·
added 23 exports
fmutate, mtt, gsplit, vlengths, whichv, `%==%`, `%!=%`, whichNA, copyv, setv, setop, `%+=%`, `%-=%`, `%*=%`, `%/=%`, allv, anyv, massign, `%=%`, rnm, relabel, setrelabel, group
1.6.5
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2021-07-24 · diff ↗
1.6.4
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2021-07-13 · diff ↗
1.6.2
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2021-07-04 · diff ↗ ·
added 2 exports
fcomputev, setLabels
1.6.0
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2021-06-28 · diff ↗ ·
added 34 exports
as_factor_GRP, as_factor_qG, date_vars, `date_vars<-`, fcumsum, fcumsum.data.frame, fcumsum.default, fcumsum.matrix, fndistinct, fndistinct.data.frame, fndistinct.default, fndistinct.matrix, fnobs, fnobs.data.frame, fnobs.default, fnobs.matrix, fhdbetween, fhdbetween.default, fhdbetween.matrix, fhdbetween.data.frame, fhdwithin, fhdwithin.default, fhdwithin.matrix, fhdwithin.data.frame, is_categorical, is_date, is_GRP, is_qG, is_unlistable, pwnobs and 4 more
R
R 4.1.0 released · 2021-05-18
1.5.3
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2021-03-07 · diff ↗
1.5.2
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2021-03-02 · diff ↗ ·
added 3 exports
fsummarise, smr, t_list
1.5.1
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2021-01-12 · diff ↗
unarchivedReturned to CRAN
2021-01-04
1.5.0
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2021-01-04 · diff ↗ ·
added 12 exports
allNA, missing_cases, `%rr%`, `%r+%`, `%r-%`, `%r*%`, `%r/%`, `%cr%`, `%c+%`, `%c-%`, `%c*%`, `%c/%`
archivedRemoved from CRAN
2020-12-19
check problems were not corrected in time
1.4.2
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2020-11-10 · diff ↗
1.4.1
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2020-11-09 · diff ↗
1.4.0
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2020-11-01 · diff ↗ ·
removed 2 exports
as.factor.GRP, group_names.GRP

added 13 exports
gby, flm, cinv, qTBL, rsplit, rsplit.default, rsplit.data.frame, fdroplevels, fdroplevels.factor, fdroplevels.data.frame, setAttrib, copyAttrib, copyMostAttrib
1.3.2
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2020-09-13 · diff ↗ ·
added 4 exports
ftransformv, tfmv, settransformv, settfmv
1.3.1
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2020-08-27 · diff ↗
1.3.0
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2020-08-11 · diff ↗ ·
added 21 exports
as.factor_GRP, as.factor_qG, `ftransform<-`, `tfm<-`, fnth, fnth.data.frame, fnth.default, fnth.matrix, gvr, `gvr<-`, fungroup, GRPnames, .c, roworder, roworderv, frename, setrename, colorder, colorderv, funique.default, funique.data.frame
1.2.1
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2020-05-27 · diff ↗
1.2.0
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2020-05-19 · diff ↗ ·
added 36 exports
fselect, slt, `fselect<-`, `slt<-`, ss, fsubset, sbt, fsubset.data.frame, fsubset.default, fsubset.matrix, ftransform, tfm, settransform, settfm, fcompute, Dlog, varying, varying.data.frame, varying.default, varying.matrix, radixorder, radixorderv, seqid, groupid, fgroup_by, fgroup_vars, is.qG, unattrib, na_omit, recode_num and 6 more
R
R 4.0.0 released · 2020-04-24
1.1.0
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2020-04-01 · diff ↗ ·
added 3 exports
ckmatch, finteraction, as.character_factor
1.0.0
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2020-03-19
R
R 3.6.0 released · 2019-04-26

Package metadata

First published: 2020-03-19
Total releases: 58 / 6 yrs
License: GPL (>= 2) | file LICENSE OSI
Minimum R: ≥ 4.1.0
Bundled data: 571 KB / 2 files
Download size: 1.4 MB

Appears in task views

Econometrics Official Statistics & Survey Statistics Time Series Analysis

Cite

Cite this package

Run in R for the authors' preferred citation:

citation("collapse")

The package provides a citation file that builds its entry when R runs it. Run citation() to see it.

The repository also keeps a CITATION.cff.

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 collapse version 2.1.8 [Data set]. HJJB, LLC. Data release v2026-10-22. https://doi.org/10.5281/zenodo.21843040

From data release v2026-10-22, which the citation names so these numbers can be found later. More on citing and the projects behind them.

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