n1qn1

6.0.1-14

Port of the 'Scilab' 'n1qn1' Module for Unconstrained BFGS Optimization

2packages depend

21.4Kdownloads / year

49.6%test coverage

9/13checks pass

Overview

About

Maintained by Matthew FidlerFirst published 2017-10-3011 releasesCRAN page ↗GitHub ↗

Provides 'Scilab' 'n1qn1'. This takes more memory than traditional L-BFGS. The n1qn1 routine is useful since it allows prespecification of a Hessian. If the Hessian is near enough the truth in optimization it can speed up the optimization problem. The algorithm is described in the 'Scilab' optimization documentation located at https://www.scilab.org/sites/default/files/optimization_in_scilab.pdf. This version uses manually modified code from 'f2c' to make this a C only binary.

Install

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

install.packages("n1qn1", 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("nlmixr2/n1qn1c")

Development version from nlmixr2/n1qn1c. 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-n1qn1

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

# 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-n1qn1

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

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-gcc
NOTE r-devel-windows-x86_64

Slowest check: 1.9 min · r-oldrel-windows-x86_64

Code health

Yes

Tests · ratio 1.18

49.6%

Coverage · measured lines

100%

Documentation · exports

Dependencies · direct

Check history

NOTE2026-07-16
11 OK · 2 NOTE · 0 WARNING · 0 ERROR · 0 FAILURE
OK2026-04-22
14 OK · 0 NOTE · 0 WARNING · 0 ERROR · 0 FAILURE
ERROR2026-04-18
13 OK · 0 NOTE · 0 WARNING · 1 ERROR · 0 FAILURE
OK2026-03-10
14 OK · 0 NOTE · 0 WARNING · 0 ERROR · 0 FAILURE

Documentation

READMEYes · 76 wordsVignettesNopkgdown siteNoNEWSYes · 100% structuredCode of conductNoContributing guideNo

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

Downloads

21.4K

CRAN downloads in the past year

Rank #2,979 · ~59/day · ~1.8K/mo

Releases R versions

Daily download trend is not available in this view yet.

1.2K30 days

4.7K90 days

21.4K1 year

Compare downloads with other packages →

Also on797 r2u2 autocran19.7K conda_forge85 c2d4u

Repository

GitHub ↗ nlmixr2/n1qn1c

1Stars

0Forks

1Open issues

0Open PRs

3Releases

113Commits

2Contributors

113 commits · Last activity 2026-04-08

Stars over time

2022-10-18 · 12026-07-07 · 1

Repository practices

Upstream repositoryBeta

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

Checks run against github.com/nlmixr2/n1qn1c on 2026-08-03.

Continuous integration (1)

GitHub Actions

Coverage (1)

Codecov

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

Development tooling

AI-assisted toolingBeta

Uses AI-assisted development tooling (declared in repo)

Earliest detected marker: claude on 2026-04-02

claude

Most recent: claude on 2026-04-02

Evidence

claude: on 2026-04-02 · evidence B, D

How this is detected·Detection ruleset v2 (updated 2026-07-29)

Dependencies

Declared dependencies

5 external dependencies (excludes base and recommended)

Depends (1)

R >= 3.2

Imports (1)

Rcpp

LinkingTo (2)

RcppArmadillo Rcpp

Suggests (2)

testthat covr

Enhances (0)

none

Dependency license breakdown →

Reverse dependencies

2direct

11indirect

nlmixr2est nlmixr2est nlmixr2

Code & Tests

People & History

People (13)

Maintainer (1)

Matthew Fidler

Author, Maintainer

Authors (3)

Matthew Fidler

Author, Maintainer

Claude Lemarechal

Author, Contributor

Wenping Wang

Author

Contributors (10)

Claude Lemarechal

Author, Contributor

Joseph Bonnans

Contributor

Stephen L. Campbell,

Contributor

Jean-Philippe Chancelier

Contributor

Bill Denney

Contributor · added in 6.0.1-13

Dirk Eddelbuettel

Contributor

Jean-Charles Gilbert

Contributor

Bruno Jofret

Contributor

Show 2 more contributors

Ramine Nikoukhah

Contributor

Claudia Sagastizabal

Contributor

INRIA

Package Timeline

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

R
R 4.6.0 released · 2026-04-24
6.0.1-14Latest
2026-04-06 · current release · diff ↗
6.0.1-13
2026-04-02 · diff ↗
R
R 4.5.0 released · 2025-04-11
6.0.1-12
2024-09-18 · diff ↗
R
R 4.4.0 released · 2024-04-24
R
R 4.3.0 released · 2023-04-21
6.0.1-11
2022-10-18 · diff ↗
R
R 4.2.0 released · 2022-04-22
R
R 4.1.0 released · 2021-05-18
6.0.1-10
2020-11-17 · diff ↗
6.0.1-9
2020-07-02 · diff ↗
6.0.1-8
2020-06-29 · diff ↗
R
R 4.0.0 released · 2020-04-24
6.0.1-7
2020-03-19 · diff ↗
6.0.1-6
2020-03-02 · diff ↗

Show 5 earlier events

R
R 3.6.0 released · 2019-04-26
6.0.1-3
2018-09-17 · diff ↗
R
R 3.5.0 released · 2018-04-23
6.0.0-1
2017-10-30
R
R 3.4.0 released · 2017-04-21

Package metadata

First published: 2017-10-30
Total releases: 11 / 9 yrs
License: CeCILL-2
Minimum R: ≥ 3.2
Download size: 26 KB
Installed size: not tracked yet
With dependencies: not tracked yet

Appears in task views

Optimization and Mathematical Programming

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