CRAN requires the check problems on this package to be fixed before 2026-08-31 or it will be archived.

lolR

2.1

Linear Optimal Low-Rank Projection

0packages depend

3.6Kdownloads / year

81.6%test coverage

0/13checks pass

Overview

About

Maintained by Eric BridgefordFirst published 2018-02-054 releasesCRAN page ↗GitHub ↗

Supervised learning techniques designed for the situation when the dimensionality exceeds the sample size have a tendency to overfit as the dimensionality of the data increases. To remedy this High dimensionality; low sample size (HDLSS) situation, we attempt to learn a lower-dimensional representation of the data before learning a classifier. That is, we project the data to a situation where the dimensionality is more manageable, and then are able to better apply standard classification or clustering techniques since we will have fewer dimensions to overfit. A number of previous works have focused on how to strategically reduce dimensionality in the unsupervised case, yet in the supervised HDLSS regime, few works have attempted to devise dimensionality reduction techniques that leverage the labels associated with the data. In this package and the associated manuscript Vogelstein et al. (2017) arXiv:1709.01233, we provide several methods for feature extraction, some utilizing labels and some not, along with easily extensible utilities to simplify cross-validative efforts to identify the best feature extraction method. Additionally, we include a series of adaptable benchmark simulations to serve as a standard for future investigative efforts into supervised HDLSS. Finally, we produce a comprehensive comparison of the included algorithms across a range of benchmark simulations and real data applications.

Install

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

install.packages("lolR", 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("neurodata/lol")

Development version from neurodata/lol. 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-lolr

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-lolR

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-lolR

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

Health

CRAN checks

13NOTE

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
NOTE r-devel-windows-x86_64
NOTE r-oldrel-macos-arm64
NOTE r-oldrel-macos-x86_64
NOTE r-oldrel-windows-x86_64
NOTE r-patched-linux-x86_64
NOTE r-release-linux-x86_64
NOTE r-release-macos-arm64
NOTE r-release-macos-x86_64
NOTE r-release-windows-x86_64

Slowest check: 5.8 min · r-devel-linux-x86_64-fedora-clang

Code health

Yes

Tests · ratio 0.60

81.6%

Coverage · measured lines

100%

Documentation · exports

Dependencies · direct

Check history

NOTE2026-03-10
0 OK · 14 NOTE · 0 WARNING · 0 ERROR · 0 FAILURE

Documentation

READMENoVignettesYes · dynamicpkgdown siteNoNEWSNoCode of conductNoContributing guideNo

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

Downloads

3.6K

CRAN downloads in the past year

Rank #14,165 · ~10/day · ~298/mo

Releases R versions

Daily download trend is not available in this view yet.

23930 days

73190 days

3.6K1 year

Compare downloads with other packages →

Also on143 r2u2 autocran

Repository

GitHub ↗ neurodata/lol

24Stars

37Forks

3Open issues

0Open PRs

2Releases

378Commits

7Contributors

License GPL-3.0 · 378 commits · Last activity 2021-02-23 · 0% stars, 30d

Stars over time

2024-11-04 · 202026-07-07 · 24

Repository practices

Upstream repositoryBeta

3 development-tooling and community-health practices detected across 3 families in the upstream repository

Checks run against github.com/neurodata/lol on 2026-07-31.

Continuous integration (1)

Travis CI

Lint, format, editor (1)

RStudio project

Coverage (1)

Codecov

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

Dependencies

Declared dependencies

12 external dependencies (excludes base and recommended)

Depends (1)

R >= 3.4.0

Imports (7)

ggplot2 abindMASSirlba pls robust robustbase

LinkingTo (0)

none

Suggests (7)

knitr rmarkdownparallelrandomForest latex2exp testthat covr

Enhances (0)

none

Dependency license breakdown →

Reverse dependencies

0direct

0indirect

Nothing depends on this yet.

Code & Tests

People & History

People (4)

Maintainer (1)

Eric Bridgeford

Author, Maintainer

Authors (1)

Eric Bridgeford

Author, Maintainer

Contributors (2)

Minh Tang

Contributor

Jason Yim

Contributor

Other (1)

Joshua Vogelstein

Thesis advisor

Package Timeline

4 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
R
R 4.2.0 released · 2022-04-22
R
R 4.1.0 released · 2021-05-18
2.1Latest
2020-06-27 · current release · diff ↗
unarchivedReturned to CRAN
2020-06-27
R
R 4.0.0 released · 2020-04-24
R
R 3.6.0 released · 2019-04-26
archivedRemoved from CRAN
2019-04-22
check errors were not corrected despite reminders
R
R 3.5.0 released · 2018-04-23
2.0
2018-04-13 · diff ↗
1.0.1
2018-02-05 · diff ↗
1.0
2018-02-05
R
R 3.4.0 released · 2017-04-21

Package metadata

First published: 2018-02-05
Total releases: 4 / 8 yrs
License: GPL-2 OSI
Minimum R: ≥ 3.4.0
Download size: 2.5 MB
Installed size: not tracked yet
With dependencies: not tracked yet

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