R Observatory: Metrics for crs version 0.15-46

Balamuta, James Joseph

doi:10.5281/zenodo.21843040

crs

0.15-46Package record

Categorical Regression Splines

4packages dependsuggested by 2

77.8Kdownloads / year

–test coverage

13/13flavors OK

Overview

About

Maintained by Jeffrey S. RacineCRAN page ↗GitHub ↗Issues ↗

Regression splines that handle a mix of continuous and categorical (discrete) data often encountered in applied settings. I would like to gratefully acknowledge support from the Natural Sciences and Engineering Research Council of Canada (NSERC, https://www.nserc-crsng.gc.ca), the Social Sciences and Humanities Research Council of Canada (SSHRC, https://www.sshrc-crsh.gc.ca), and the Shared Hierarchical Academic Research Computing Network (SHARCNET, https://www.sharcnet.ca). We would also like to acknowledge the contributions of the GNU GSL authors. In particular, we adapt the GNU GSL B-spline routine gsl_bspline.c adding automated support for quantile knots (in addition to uniform knots), providing missing functionality for derivatives, and for extending the splines beyond their endpoints.

Changes in 0.15-46

Retired the duplicated demo/spline.R implementation and its release-time copy step. The constrained mean, first-derivative, second-derivative, and bootstrap-test demos already use the exported crshat() operator backed by the canonical package implementation, so fitted and constraint arithmetic are unchanged while the package no longer ships a second copy of its spline engine.
Added the opt-in observed native NOMAD solve interface used by downstream packages for throttled progress heartbeats during long objective evaluations. The versioned C API reports evaluation and cooperative-activity events out of band, preserves the numerical solve and cache/accounting contracts, disables only observation after ordinary observer errors, and converts explicit user interruption into an orderly native stop. The original native solve entry point remains source- and binary-compatible.

Show all changes in 0.15-46Hide the rest of the changes in 0.15-46

Hardened the public clsd() scalar-condition contract for elastic.max and NOMAD. Ambiguous vectors, empty values, missing values, and values which cannot be interpreted by the historical scalar operator semantics now fail early with argument-specific errors; valid logical and numeric scalar controls retain their existing search routes and fitted results.
Modernized crsiv() and crsivderiv() with training-grid formula/data interfaces (y ~ z | w and y ~ z | w | x), one authoritative row map for subset/NA/weights/starting values, collision-safe internal role names, and namespaced IV metadata. Added selected-state fitted(), residuals(), and predict() semantics, structured summaries, corrected original-response plot overlays, and self-contained formula-based examples. Native evaluation interfaces and established CRS post-fit projection remain available; formula-time evaluation and formula-object newdata are deliberately deferred and fail clearly.
Corrected fitted-value centering throughout crsivderiv() so both empirical terms of the Equation (14) adjoint use the same fitted conditional-residual vector. The initial adjoint had centered its second term on the raw residual, while the constructed-residual route also averaged the wrong constructed quantity in both initial and recursive states. This can materially change derivative trajectories, stopping states, and fitted curves, and removes catastrophic finite-sample losses observed under the malformed constructed-residual adjoint.
Made crsivderiv() Landweber-Fridman states coherent with the estimator definition: iteration N now stores the matched derivative, integrated curve, and stopping criterion after exactly N updates. Explicit starting.values are the state used immediately before update 1, without a hidden preliminary update. Returned phi and phi.prime, the reported iteration, and the summary stopping value now all refer to the selected state. This corrects the previous one-column mismatch between the curve and derivative histories; results can change when that mismatch affected state selection or extraction.
Corrected the private Gaussian integral operator used by crsivderiv() so the empirical adjoint applies the ordinary kernel CDF required by Equation (14) of Florens, Centorrino, and Racine. The helper had multiplied the CDF average by the continuous bandwidth, producing the same malformed scaling implicated in np issue #57. Other spline fitting, bandwidth, stopping, optimizer, and public helper behavior is unchanged.
Hardened the observed native NOMAD interface so explicit user interruption has a dedicated status after orderly native cleanup, ordinary observer errors remain fail-open, and a failed callback cannot expose unwritten black-box output memory. Existing native ABI values, layouts, callable names, and successful-run numerical/accounting behavior are unchanged.
Hardened native NOMAD interruption by limiting the operating-system signal handler to signal-safe state capture, consuming interruption from ordinary solver control flow, and restoring the prior process handler before return. Interrupt status now takes precedence when a solve is interrupted after an earlier callback failure, and R-callback failures retain their first trapped diagnostic in the bounded result message.

From NEWS.md in the release

Install

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

install.packages("crs", 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("JeffreyRacine/R-Package-crs")

Development version from JeffreyRacine/R-Package-crs. 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-crs

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-crs

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-crs

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: 25.0 min · r-oldrel-windows-x86_64

Status changes

OK13 OK2026-08-05
NOTE12 OK, 1 NOTE2026-08-01
OK13 OK2026-05-17
WARNING12 OK, 1 WARNING2026-05-13
OK12 OK2026-04-25

Show 1 earlier changeHide 1 earlier change

NOTE12 OK, 2 NOTE2026-03-10

Advisories

none known

How this is measured·How advisories are found

Documentation

In release 0.15-46

READMEYes · 207 wordsVignettesYes · 1 · dynamicNEWSYes · 100% structured · mentions 0.15-46Citation fileNoWebsitenot declared in DESCRIPTION

Help pages: 21includes a package overview page
Examples that run: 63%12 run in a plain check · 7 never run
Exported functions with examples: 100%
Documented parameters: 82%
Return-value docs: 100%
Help pages citing references: 81%

Also includes 14 demo scripts (run with demo())

Vignettes (1)

Getting Started with crs HTML

How these are measured

Downloads

77.8K

CRAN downloads in the past year

Rank #1,263 · ~213/day · ~6.5K/mo

Releases R versions

Daily download trend is not available in this view yet.

8.6K30 days

24.1K90 days

77.8K1 year

Compare downloads with other packages →

Also on1.2K r2u12 autocran3.2K conda_forge171 c2d4u

How downloads are counted

Repository

jeffreyracine/r-package-crs ↗Account: JeffreyRacine

17Stars

5Forks

1Open issues

0Open PRs

0Releases

1,436Commits

5Commit identities

1,436 commits · Last activity 2026-08-09

Responsiveness

How these are sampled

PRs merged (all time): 40%
Median days to close, 50 most recently updated closed issues: 1
Median days to close, 50 most recently updated closed PRs: 1

Stars over time

2022-09-21 · 162026-07-07 · 17

How these are measured

PracticesBeta

Checks run against github.com/jeffreyracine/r-package-crs on 2026-10-18.

No development-tooling practices detected in the upstream repository.

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

Dependencies

Declared dependencies

8 external dependencies (excludes base and recommended)

Installing crs adds 3 packages (2 with compiled code, 1.4 MB of source tarballs). Heaviest: quantreg 903 KB, SparseM 540 KB, MatrixModels 24 KB.

Depends (0)

none

Imports (3)

bootstatsquantreg

LinkingTo (0)

none

Suggests (8)

ggplot2 knitr logsplineMASSquadprog rgl rmarkdown testthat

Enhances (0)

none

Dependency license breakdown →

Reverse dependencies

4direct

47indirect

Imports 4 · LinkingTo 2

Suggested by 2

Depends, Imports or LinkingTo, most downloaded first

np cops bdlnm npRmpi

Suggests, most downloaded first

mlr laGP

How these are counted

Code & Tests

Datasets

People & History

People (3)

Jeffrey S. Racine

Author, Maintainer since 0.14-7 (2011)

Zhenghua Nie

Author

Brian D. Ripley

Contributor · added in 0.15-20

stepCV.R

Releases (45)

Pick two releases to compare their code metrics.

0.15-46Latest
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2026-08-19 · current release · diff ↗
0.15-45
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2026-06-26 · diff ↗ ·
added 3 exports
crshat, crs_boot_control, crs_grid_control
0.15-44
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2026-06-01 · diff ↗
0.15-43
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2026-05-15 · diff ↗
0.15-42
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2026-05-01 · diff ↗
R
R 4.6.0 released · 2026-04-24
0.15-41
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2026-04-11 · diff ↗ ·
removed 1 export
npglpreg
0.15-39
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2026-01-29 · diff ↗
R
R 4.5.0 released · 2025-04-11
0.15-38
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2024-09-29 · diff ↗
R
R 4.4.0 released · 2024-04-24
R
R 4.3.0 released · 2023-04-21
0.15-37
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2023-01-07 · diff ↗
0.15-36
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2022-10-19 · diff ↗
0.15-35
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2022-10-09 · diff ↗
R
R 4.2.0 released · 2022-04-22

Show 46 earlier eventsHide 46 earlier events

0.15-34
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2022-03-31 · diff ↗
R
R 4.1.0 released · 2021-05-18
0.15-33
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2021-02-02 · diff ↗
R
R 4.0.0 released · 2020-04-24
0.15-31.1
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2019-11-25 · diff ↗
R
R 3.6.0 released · 2019-04-26
0.15-31
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2018-05-01 · diff ↗
R
R 3.5.0 released · 2018-04-23
0.15-30
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2018-01-05 · diff ↗
0.15-29
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2017-10-31 · diff ↗
0.15-28
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2017-10-29 · diff ↗
0.15-27
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2017-05-07 · diff ↗
0.15-26
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2017-05-03 · diff ↗
R
R 3.4.0 released · 2017-04-21
R
R 3.3.0 released · 2016-05-03
R
R 3.2.0 released · 2015-04-16
0.15-24
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2014-12-18 · diff ↗
0.15-23
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2014-08-11 · diff ↗
R
R 3.1.0 released · 2014-04-10
0.15-22
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2014-01-22 · diff ↗
0.15-21
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2014-01-09 · diff ↗
0.15-20
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2014-01-03 · diff ↗
0.15-19
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2014-01-01 · diff ↗ ·
added 1 export
clsd
R
R 3.0.0 released · 2013-04-03
0.15-18
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2012-12-29 · diff ↗
0.15-17
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2012-06-04 · diff ↗
0.15-16
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2012-04-30 · diff ↗
0.15-15
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2012-04-16 · diff ↗
R
R 2.15.0 released · 2012-03-30
0.15-14
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2012-03-22 · diff ↗
0.15-13
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2012-03-05 · diff ↗ ·
added 1 export
crsivderiv
0.15-12
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2011-12-07 · diff ↗
0.15-11
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2011-12-03 · diff ↗
0.15-9
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2011-11-26 · diff ↗
0.15-8
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2011-11-16 · diff ↗
R
R 2.14.0 released · 2011-10-31
0.15-7
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2011-10-24 · diff ↗
0.15-6
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2011-10-19 · diff ↗
0.15-4
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2011-10-15 · diff ↗
0.15-3
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2011-09-05 · diff ↗ ·
added 1 export
crssigtest
0.15-2
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2011-07-30 · diff ↗ ·
added 2 exports
npglpreg, glp.model.matrix
0.15-0
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2011-06-24 · diff ↗
0.14-9
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2011-06-20 · diff ↗
0.14-8
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2011-06-15 · diff ↗
0.14-7
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2011-06-09
R
R 2.13.0 released · 2011-04-13

Package metadata

First published: 2011-06-09
Total releases: 45 / 15 yrs
License: GPL (>= 3) OSI
Bundled data: 70 KB / 3 files
Download size: 1.5 MB

Appears in task views

Optimization and Mathematical Programming

Cite

Cite this package

Run in R for the authors' preferred citation:

citation("crs")

Format

Racine, J. S., Nie, Z., & Ripley, B. D. (2026). crs: Categorical Regression Splines (Version 0.15-46) [Computer software]. https://doi.org/10.32614/CRAN.package.crs

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 crs version 0.15-46 [Data set]. HJJB, LLC. Data release v2026-10-21. https://doi.org/10.5281/zenodo.21843040

From data release v2026-10-21, which the citation names so these numbers can be found later. More on citing and the projects behind them.

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