R Observatory: Metrics for lfl version 2.4.0

Balamuta, James Joseph

doi:10.5281/zenodo.21843040

lfl

2.4.0Package record

Linguistic Fuzzy Logic

0packages depend

4.7Kdownloads / year

83.0%test coverage

8/13flavors OK

Overview

About

Maintained by Michal BurdaCRAN page ↗

Various algorithms related to linguistic fuzzy logic: mining for linguistic fuzzy association rules, composition of fuzzy relations, performing Mamdani, implicative, and perception-based logical deduction (PbLD), and forecasting time-series using fuzzy rule-based ensemble (FRBE). The package also contains basic fuzzy-related algebraic functions capable of handling missing values in different styles (Bochvar, Sobocinski, Kleene etc.), computation of Sugeno integrals and the fuzzy transform.

Changes in 2.4.0

released: 2026-07-03
added upperBound() algebra for missing values
added infer() function for Mamdani and implicative inference
fixed bugs

From NEWS.md in the release

Install

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

install.packages("lfl", 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-lfl

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-lfl

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-lfl

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

5NOTE8OK

Check messages

NOTER code for possible problemsr-devel-linux-x86_64-debian-clang, r-devel-linux-x86_64-debian-gcc, r-devel-linux-x86_64-fedora-clang, r-devel-linux-x86_64-fedora-gcc, r-devel-windows-x86_64

Found calls to structure() using deprecated special names:
  lfl/R/frbemodel.R (.Names: 8, .Dim: 4, .Dimnames: 4)
  lfl/tests/testthat/test-lingexpr.R (.Names: 4)
'.Names' should be changed to 'names'.
'.Dim' should be changed to 'dim'.
'.Dimnames' should be changed to 'dimnames'.

CRAN check page ↗

Slowest check: 5.2 min · r-devel-windows-x86_64

Status changes

NOTE8 OK, 5 NOTENow
NOTE11 OK, 2 NOTE2026-07-16
OK13 OK2026-06-09
ERROR12 OK, 1 ERROR2026-06-08
OK12 OK2026-04-25
NOTE13 OK, 1 NOTE2026-04-22

Show 2 earlier changesHide 2 earlier changes

ERROR12 OK, 1 NOTE, 1 ERROR2026-04-18
NOTE13 OK, 1 NOTE2026-03-10

Advisories

none known

How this is measured·How advisories are found

Documentation

In release 2.4.0

READMEYes · 116 wordsVignettesYes · 1 · staticNEWSYes · 100% structured · mentions 2.4.0Citation fileYes · cites a publicationWebsitenot declared in DESCRIPTION

Help pages: 56 (1 internal)includes a package overview page
Examples that run: 100%37 run in a plain check
Exported functions with examples: 70%
Documented parameters: 94%
Return-value docs: 95%
Help pages citing references: 20%

Vignettes (1)

lfl: An R Package for Linguistic Fuzzy Logic PDF

How these are measured

Downloads

4.7K

CRAN downloads in the past year

Rank #5,520 · ~13/day · ~396/mo

Releases R versions

Daily download trend is not available in this view yet.

55330 days

1.5K90 days

4.7K1 year

Compare downloads with other packages →

Also on411 r2u5 autocran53 c2d4u

How downloads are counted

Dependencies

Declared dependencies

13 external dependencies (excludes base and recommended)

Installing lfl adds 44 packages (27 with compiled code, 26 MB of source tarballs). Heaviest: ggplot2 6.0 MB, colorspace 2.0 MB, Rcpp 1.8 MB.

Depends (1)

R >= 3.6

Imports (7)

Rcpp foreach forecast plyr tseries e1071 tibble

LinkingTo (1)

Rcpp

Suggests (5)

testthat doMC knitr rmarkdown R.rsp

Enhances (0)

none

Dependency license breakdown →

Reverse dependencies

0direct

0indirect

Nothing depends on this yet.

How these are counted

Code & Tests

People & History

People (1)

Michal Burda

Author, Maintainer since 1.0 (2015)

Releases (17)

Pick two releases to compare their code metrics.

2.4.0Latest
record
2026-07-03 · current release · diff ↗ ·
added 2 exports
infer, upperBound
R
R 4.6.0 released · 2026-04-24
2.3.1
record
2025-12-16 · diff ↗
2.3.0
record
2025-06-27 · diff ↗ ·
added 1 export
lowerBound
R
R 4.5.0 released · 2025-04-11
2.2.1
record
2024-10-22 · diff ↗
R
R 4.4.0 released · 2024-04-24
R
R 4.3.0 released · 2023-04-21
2.2.0
record
2022-09-08 · diff ↗ ·
added 5 exports
equidist, equifreq, ft, ftinv, is.ft
R
R 4.2.0 released · 2022-04-22
2.1.2
record
2021-08-23 · diff ↗
R
R 4.1.0 released · 2021-05-18
2.1.1
record
2020-11-04 · diff ↗
2.1.0
record
2020-10-15 · diff ↗ ·
removed 3 exports
lcut3, lcut5, raisedcosinal

added 5 exports
lowerEst, nelson, quantifier, raisedcosine, sugeno
2.0.1
record
2020-05-19 · diff ↗
R
R 4.0.0 released · 2020-04-24

Show 16 earlier eventsHide 16 earlier events

2.0
record
2020-02-11 · diff ↗ ·
removed 26 exports
as.data.frame.farules, as.matrix.fsets, cbind.fsets, fcut.data.frame, fcut.default, fcut.matrix, fcut.numeric, head.farules, head.fsets, lcut3.data.frame, lcut5.data.frame, lcut3.default, lcut5.default, lcut3.matrix, lcut5.matrix, lcut3.numeric, lcut5.numeric, plot.fsets, print.farules, print.frbe, print.fsets, sel.farules, sel.fsets, sel, tail.farules, tail.fsets

added 26 exports
specs<-, vars<-, allowed.lingexpr, as.ctx3, as.ctx3bilat, as.ctx5, as.ctx5bilat, ctx3, ctx3bilat, ctx5, ctx5bilat, defaultHedgeParams, dragonfly, hedge, horizon, is.ctx3, is.ctx3bilat, is.ctx5, is.ctx5bilat, kleene, lcut, lingexpr, minmax, raisedcosinal, sobocinski, triangular
R
R 3.6.0 released · 2019-04-26
unarchivedReturned to CRAN
2018-08-01
1.4.2
record
2018-08-01 · diff ↗
archivedRemoved from CRAN
2018-07-30
memory-access errors were not corrected despite reminder
R
R 3.5.0 released · 2018-04-23
1.4.1
record
2018-04-12 · diff ↗
1.4
record
2017-04-25 · diff ↗ ·
removed 1 export
pattern:^[[:alpha:]]+

added 79 exports
aggregateConsequents, algebra, antecedents, as.data.frame.farules, as.matrix.fsets, cbind.fsets, compose, consequents, defuzz, evalfrbe, farules, fcut.data.frame, fcut.default, fcut.matrix, fcut.numeric, fcut, fire, frbe, fsets, head.farules, head.fsets, is.algebra, is.farules, is.frbe, is.fsets, is.specific, lcut3.data.frame, lcut5.data.frame, lcut3.default, lcut5.default and 49 more
R
R 3.4.0 released · 2017-04-21
R
R 3.3.0 released · 2016-05-03
1.3
record
2016-04-22 · diff ↗
1.2
record
2015-06-18 · diff ↗
1.1
record
2015-06-03 · diff ↗
R
R 3.2.0 released · 2015-04-16
1.0
record
2015-01-15
R
R 3.1.0 released · 2014-04-10

Package metadata

First published: 2015-01-15
Total releases: 17 / 11 yrs
License: GPL-3 OSI
Minimum R: ≥ 3.6
Download size: 519 KB

Appears in task views

Machine Learning & Statistical Learning Missing Data

Cite

Cite this package

Run in R for the authors' entry:

citation("lfl")

The package provides a citation file, so citation() returns the authors' own entry.

It points to 10.1016/j.fss.2021.07.007.

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 lfl version 2.4.0 [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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