scs

3.2.7

Splitting Conic Solver

5packages depend

134.5Kdownloads / year

93.7%test coverage

13/13checks pass

Overview

About

Maintained by Florian SchwendingerFirst published 2016-02-238 releasesCRAN page ↗GitHub ↗

Solves convex cone programs via operator splitting. Can solve: linear programs ('LPs'), second-order cone programs ('SOCPs'), semidefinite programs ('SDPs'), exponential cone programs ('ECPs'), and power cone programs ('PCPs'), or problems with any combination of those cones. 'SCS' uses 'AMD' (a set of routines for permuting sparse matrices prior to factorization) and 'LDL' (a sparse 'LDL' factorization and solve package) from 'SuiteSparse' (https://people.engr.tamu.edu/davis/suitesparse.html).

Install

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

install.packages("scs", 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("FlorianSchwendinger/scs")

Development version from FlorianSchwendinger/scs. 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-scs

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-scs

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-scs

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

Health

CRAN checks

13OK

Slowest check: 3.3 min · r-oldrel-windows-x86_64

Code health

Yes

Tests · ratio 0.03

93.7%

Coverage · measured lines

100%

Documentation · exports

Dependencies · direct

Check history

OK2026-07-05
13 OK · 0 NOTE · 0 WARNING · 0 ERROR · 0 FAILURE
ERROR2026-07-04
12 OK · 0 NOTE · 0 WARNING · 1 ERROR · 0 FAILURE
OK2026-05-29
13 OK · 0 NOTE · 0 WARNING · 0 ERROR · 0 FAILURE
ERROR2026-05-27
12 OK · 0 NOTE · 0 WARNING · 1 ERROR · 0 FAILURE
OK2026-04-25
12 OK · 0 NOTE · 0 WARNING · 0 ERROR · 0 FAILURE

Show 3 earlier snapshots

NOTE2026-03-17
11 OK · 3 NOTE · 0 WARNING · 0 ERROR · 0 FAILURE
ERROR2026-03-14
11 OK · 2 NOTE · 0 WARNING · 1 ERROR · 0 FAILURE
NOTE2026-03-10
11 OK · 3 NOTE · 0 WARNING · 0 ERROR · 0 FAILURE

Documentation

READMEYes · 221 wordsVignettesNopkgdown siteNoNEWSYes · 100% structuredCode of conductNoContributing guideNo

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

Downloads

134.5K

CRAN downloads in the past year

Rank #1,201 · ~369/day · ~11.2K/mo

Releases R versions

Daily download trend is not available in this view yet.

9.1K30 days

30.1K90 days

134.5K1 year

Compare downloads with other packages →

Also on2.6K r2u35 autocran47.3K conda_forge78 c2d4u

Repository

GitHub ↗ florianschwendinger/scs

8Stars

3Forks

0Open issues

0Open PRs

1Releases

57Commits

7Contributors

roptimizationconvex

57 commits · Last activity 2025-04-14

Stars over time

2025-02-28 · 82026-07-07 · 8

Repository practices

Upstream repositoryBeta

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

Checks run against github.com/florianschwendinger/scs on 2026-07-30.

Reproducibility and dev environment (1)

Makefile

Git structural (1)

Submodules

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

Dependencies

Declared dependencies

2 external dependencies (excludes base and recommended)

Depends (1)

R >= 3.5.0

Imports (0)

none

LinkingTo (0)

none

Suggests (3)

Matrixslam tinytest

Enhances (0)

none

Dependency license breakdown →

Reverse dependencies

5direct

43indirect

CVXR ROI.plugin.scs EmpiricalDynamics diffcp optweight

Code & Tests

People & History

People (6)

Maintainer (1)

Florian Schwendinger

Author, Maintainer

Authors (3)

Florian Schwendinger

Author, Maintainer

Balasubramanian Narasimhan

Author · added in 1.3-1

Brendan O'Donoghue

Author, Copyright holder

Brendan O'Donoghue

Author, Copyright holder

Patrick R. Amestory

Timothy A. Davis

Iain S. Duff

Package Timeline

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

R
R 4.6.0 released · 2026-04-24
3.2.7Latest
2025-04-14 · current release · diff ↗
R
R 4.5.0 released · 2025-04-11
R
R 4.4.0 released · 2024-04-24
R
R 4.3.0 released · 2023-04-21
3.2.4
2023-04-11 · diff ↗
3.0-1
2022-08-25 · diff ↗
R
R 4.2.0 released · 2022-04-22
3.0-0
2021-11-07 · diff ↗
R
R 4.1.0 released · 2021-05-18
R
R 4.0.0 released · 2020-04-24
1.3-2
2019-11-19 · diff ↗
1.3-1
2019-11-05 · diff ↗
R
R 3.6.0 released · 2019-04-26
1.2-3
2019-03-06 · diff ↗
R
R 3.5.0 released · 2018-04-23

Show 4 earlier events

R
R 3.4.0 released · 2017-04-21
R
R 3.3.0 released · 2016-05-03
1.1-1
2016-02-23
R
R 3.2.0 released · 2015-04-16

Package metadata

First published: 2016-02-23
Total releases: 8 / 10 yrs
License: GPL-3 OSI
Minimum R: ≥ 3.5.0
Download size: 1.8 MB
Installed size: not tracked yet
With dependencies: not tracked yet

Appears in task views

Optimization and Mathematical Programming

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