R Observatory: Metrics for L2E version 2.0

Balamuta, James Joseph

doi:10.5281/zenodo.21843040

L2E

2.0

Robust Structured Regression via the L2 Criterion

0packages depend

2.8Kdownloads / year

–test coverage

9/13checks pass

Overview

About

Maintained by Jocelyn ChiFirst published 2022-01-072 releasesCRAN page ↗

An implementation of a computational framework for performing robust structured regression with the L2 criterion from Chi and Chi (2021+). Improvements using the majorization-minimization (MM) principle from Liu, Chi, and Lange (2022+) added in Version 2.0.

Install

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

install.packages("L2E", repos = "https://cloud.r-project.org/")

Installs the current CRAN release. Prebuilt binaries on Windows and macOS.

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-l2e

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-L2E

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-L2E

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-clang
NOTE r-devel-linux-x86_64-fedora-gcc

Slowest check: 4.0 min · r-oldrel-windows-x86_64

Code health

None

Tests · ratio 0.00

not tracked

Coverage

100%

Documentation · exports

7

Dependencies · direct

Check history

NOTE2026-03-10
10 OK · 4 NOTE · 0 WARNING · 0 ERROR · 0 FAILURE

Documentation

READMEYes · 160 wordsVignettesYes · dynamicpkgdown siteNoNEWSNoCode of conductNoContributing guideNo

Examples that run: 100%
Documented parameters: 100%
Return-value docs: 100%
References docs: 3%

Downloads

2.8K

CRAN downloads in the past year

Rank #16,324 · ~8/day · ~232/mo

Releases R versions

Daily download trend is not available in this view yet.

16730 days

64890 days

2.8K1 year

Compare downloads with other packages →

Also on97 r2u2 autocran

Dependencies

Declared dependencies

10 external dependencies (excludes base and recommended)

Depends (2)

R >= 3.5.0osqp

Imports (6)

isotone cobs ncvregMatrixsignal robustbase

LinkingTo (0)

none

Suggests (4)

knitr rmarkdown ggplot2 latex2exp

Enhances (0)

none

Dependency license breakdown →

Reverse dependencies

0direct

0indirect

Nothing depends on this yet.

Code & Tests

Datasets

People & History

People (5)

Maintainer (1)

Jocelyn Chi

Author, Maintainer

Authors (4)

Jocelyn Chi

Author, Maintainer

Eric Chi

Author

Kenneth Lange

Author · added in 2.0

Xiaoqian Liu

Author, Contributor · added in 2.0

Contributors (2)

Xiaoqian Liu

Author, Contributor · added in 2.0

Lisa Lin

Contributor · added in 2.0

Package Timeline

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

R
R 4.6.0 released · 2026-04-24
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
2.0Latest
2022-09-08 · current release · diff ↗
R
R 4.2.0 released · 2022-04-22
1.0
2022-01-07
R
R 4.1.0 released · 2021-05-18

Package metadata

First published: 2022-01-07
Total releases: 2 / 4 yrs
License: GPL (>= 2) OSI
Minimum R: ≥ 3.5.0
Bundled data: 16 KB / 1 file
Download size: 265 KB
Installed size: not tracked yet
With dependencies: not tracked yet

Cite

Cite this package

Run in R for the authors' preferred citation:

citation("L2E")

Format

Chi, J., Chi, E., Lange, K., Lin, L., & Liu, X. (2022). L2E: Robust Structured Regression via the L2 Criterion (Version 2.0) [Computer software]. https://doi.org/10.32614/CRAN.package.L2E

This is what citation() produces when a package has no citation file of its own. If it prints something else, use that.

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 L2E version 2.0 [Data set]. HJJB, LLC. Data release v2026-08-18. https://doi.org/10.5281/zenodo.21843040

From data release v2026-08-18, which the citation names so these numbers can be found later. More on citing and the projects behind them.

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