crs

0.15-45

Categorical Regression Splines

6packages depend

73Kdownloads / year

–test coverage

12/13checks pass

Overview

About

Maintained by Jeffrey S. RacineFirst published 2011-06-0944 releasesCRAN page ↗GitHub ↗

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.

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.

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).

Health

CRAN checks

1NOTE12OK

Failing flavors

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

Slowest check: 29.0 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

NOTE2026-08-01
12 OK · 1 NOTE · 0 WARNING · 0 ERROR · 0 FAILURE
OK2026-05-17
13 OK · 0 NOTE · 0 WARNING · 0 ERROR · 0 FAILURE
WARNING2026-05-13
12 OK · 0 NOTE · 1 WARNING · 0 ERROR · 0 FAILURE
OK2026-04-25
12 OK · 0 NOTE · 0 WARNING · 0 ERROR · 0 FAILURE
NOTE2026-03-10
12 OK · 2 NOTE · 0 WARNING · 0 ERROR · 0 FAILURE

Documentation

READMEYes · 207 wordsVignettesYes · dynamicpkgdown siteNoNEWSYes · 100% structuredCode of conductNoContributing guideNo

Examples that run: 100%
Documented parameters: 82%
Return-value docs: 100%
References docs: 81%

Downloads

73K

CRAN downloads in the past year

Rank #1,238 · ~200/day · ~6.1K/mo

Releases R versions

Daily download trend is not available in this view yet.

11.2K30 days

27.9K90 days

73K1 year

Compare downloads with other packages →

Also on913 r2u4 autocran381 conda_forge81 c2d4u

Repository

GitHub ↗ jeffreyracine/r-package-crs

17Stars

5Forks

1Open issues

0Open PRs

0Releases

1,432Commits

5Contributors

1,432 commits · Last activity 2026-07-21 · +6.3% stars, 30d

Stars over time

2022-09-21 · 162026-07-07 · 17

Repository practices

Upstream repositoryBeta

Checks run against github.com/jeffreyracine/r-package-crs on 2026-08-02.

No development-tooling practices detected in the upstream repository.

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

Dependencies

Declared dependencies

8 external dependencies (excludes base and recommended)

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

6direct

43indirect

bdlnm cops np npRmpi np npRmpi laGP mlr

Code & Tests

Datasets

People & History

People (3)

Maintainer (1)

Jeffrey S. Racine

Author, Maintainer

Authors (2)

Jeffrey S. Racine

Author, Maintainer

Zhenghua Nie

Author

Contributors (1)

Brian D. Ripley

Contributor · added in 0.15-20

Package Timeline

44 releases. Pick two to compare their code metrics. R releases are shown for context.

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2026-06-26 · current release · diff ↗
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R 4.6.0 released · 2026-04-24
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R 4.5.0 released · 2025-04-11
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R 4.4.0 released · 2024-04-24
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R 4.3.0 released · 2023-04-21
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R 4.2.0 released · 2022-04-22
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R 4.1.0 released · 2021-05-18
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R 4.0.0 released · 2020-04-24
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R 3.0.0 released · 2013-04-03
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R 2.15.0 released · 2012-03-30
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R 2.14.0 released · 2011-10-31
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R 2.13.0 released · 2011-04-13

Package metadata

First published: 2011-06-09
Total releases: 44 / 15 yrs
License: GPL (>= 3) OSI
Bundled data: 70 KB / 3 files
Download size: 1.4 MB
Installed size: not tracked yet
With dependencies: not tracked yet

Appears in task views

Optimization and Mathematical Programming

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