R Observatory: Metrics for folda version 0.2.0

Balamuta, James Joseph

doi:10.5281/zenodo.21843040

folda

0.2.0Package record

Forward Stepwise Discriminant Analysis with Pillai's Trace

1packages depend

6.2Kdownloads / year

82.4%test coverage

13/13flavors OK

Overview

About

Maintained by Siyu WangCRAN page ↗GitHub ↗Website ↗Issues ↗

A novel forward stepwise discriminant analysis framework that integrates Pillai's trace with Uncorrelated Linear Discriminant Analysis (ULDA), providing an improvement over traditional stepwise LDA methods that rely on Wilks' Lambda. A stand-alone ULDA implementation is also provided, offering a more general solution than the one available in the 'MASS' package. It automatically handles missing values and provides visualization tools. For more details, see Wang (2024) doi:10.48550/arXiv.2409.03136.

Changes in 0.2.0

Update examples in the README and Vignette.
Fallback to base::svd for users that do have the latest C++ Eigen module.
Remove redundant help manual.
Export the functions needed for the LDATree package.
Update the algorithm: Introduce the Chi-Squared variable selection when no significant variables.

From NEWS.md in the release

Install

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

install.packages("folda", 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("Moran79/folda")

Development version from Moran79/folda. 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-folda

Fast Ubuntu binaries via r2u (no compilation). The cranapt setup runs once and is skipped when it is already enabled. We list this channel from recorded r2u download activity rather than from a live index of the repository, so treat it as last known rather than guaranteed.

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-folda

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-folda

RPMs auto-built from CRAN on openSUSE OBS (Tumbleweed). We list this channel from recorded autoCRAN download activity rather than from a live index of the repository, so treat it as last known rather than guaranteed.

Health

CRAN checks

13OK

CRAN check page ↗

Slowest check: 4.1 min · r-devel-windows-x86_64

Status changes

OK13 OK2026-08-05
NOTE12 OK, 1 NOTE2026-08-01
OK13 OK2026-06-09
ERROR12 OK, 1 ERROR2026-06-08
OK12 OK2026-04-25

Show 3 earlier changesHide 3 earlier changes

NOTE12 OK, 2 NOTE2026-04-22
ERROR11 OK, 2 NOTE, 1 ERROR2026-04-18
NOTE12 OK, 2 NOTE2026-03-10

Advisories

none known

How this is measured·How advisories are found

Documentation

In release 0.2.0

READMEYes · 530 wordsVignettesYes · 1 · dynamicNEWSYes · 100% structured · mentions 0.2.0Citation fileNoWebsiteYes · pkgdown

Help pages: 8
Examples that run: 100%8 run in a plain check
Exported functions with examples: 100%
Documented parameters: 100%
Return-value docs: 100%
Help pages citing references: 25%

Vignettes (1)

Introduction to folda HTML

How these are measured

Downloads

6.2K

CRAN downloads in the past year

Rank #8,796 · ~17/day · ~517/mo

Releases R versions

Daily download trend is not available in this view yet.

38630 days

1.1K90 days

6.2K1 year

Compare downloads with other packages →

Also on390 r2u5 autocran

How downloads are counted

Repository

moran79/folda ↗Account: Moran79

2Stars

0Forks

0Open issues

0Open PRs

2Releases

34Commits

1Commit identities

34 commits · Last activity 2024-10-30 · Default branch at 0.2.0.9000, ahead of CRAN 0.2.0 (checked 2026-10-18)

Responsiveness

How these are sampled

PRs merged (all time): not measured
Median days to close, 50 most recently updated closed issues: 7
Median days to close, 50 most recently updated closed PRs: not measured

Stars over time

2024-12-11 · 22026-07-07 · 2

How these are measured

PracticesBeta

9 development-tooling and community-health practices detected across 4 families in the upstream repository

Checks run against github.com/moran79/folda on 2026-10-18.

Continuous integration (2)

GitHub ActionsR CMD check workflow

The R CMD check workflow runs on Linux, macOS and Windows, and on R-devel

Docs source (4)

README.Rmdpkgdown

GitHub Pages site last deployed 2024-10-30 · The repository has a site deploy workflow

pkgdown site last built 2024-10-30

CRAN release process (2)

cran-comments.mdrevdep/

Lint, format, editor (1)

RStudio project

How this is detected·Detection ruleset v3 (2026-09-26)

Dependencies

Declared dependencies

7 external dependencies (excludes base and recommended)

Installing folda adds 19 packages (9 with compiled code, 17 MB of source tarballs). Heaviest: ggplot2 6.0 MB, Rcpp 1.8 MB, RcppEigen 1.7 MB.

Depends (0)

none

Imports (4)

ggplot2grDevicesRcppstats

LinkingTo (2)

Rcpp RcppEigen

Suggests (3)

knitr rmarkdown testthat

Enhances (0)

none

Dependency license breakdown →

Reverse dependencies

1direct

0indirect

Imports 1

Depends, Imports or LinkingTo, most downloaded first

LDATree

How these are counted

Code & Tests

People & History

People (1)

Siyu Wang

Releases (2)

Pick two releases to compare their code metrics.

R
R 4.6.0 released · 2026-04-24
R
R 4.5.0 released · 2025-04-11
0.2.0Latest
record
2024-10-29 · current release · diff ↗ ·
added 3 exports
checkPriorAndMisClassCost, getChiSqStat, getMode
0.1.0
record
2024-09-11
R
R 4.4.0 released · 2024-04-24

Package metadata

First published: 2024-09-11
Total releases: 2 / 2 yrs
License: MIT + file LICENSE OSI
Download size: 520 KB

Cite

Cite this package

Run in R for the authors' preferred citation:

citation("folda")

Format

Wang, S. (2024). folda: Forward Stepwise Discriminant Analysis with Pillai's Trace (Version 0.2.0) [Computer software]. https://doi.org/10.32614/CRAN.package.folda

This package has no citation file, so citation() returns this entry built from DESCRIPTION.

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 folda version 0.2.0 [Data set]. HJJB, LLC. Data release v2026-10-21. https://doi.org/10.5281/zenodo.21843040

From data release v2026-10-21, which the citation names so these numbers can be found later. More on citing and the projects behind them.

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