lfl

2.4.0

Linguistic Fuzzy Logic

0packages depend

4.5Kdownloads / year

83.0%test coverage

9/13checks pass

Overview

About

Maintained by Michal BurdaFirst published 2015-01-1517 releasesCRAN 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.

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.

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).

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: 5.2 min · r-devel-linux-x86_64-fedora-clang

Code health

Yes

Tests · ratio 0.85

83.0%

Coverage · measured lines

100%

Documentation · exports

Dependencies · direct

Check history

NOTE2026-07-16
11 OK · 2 NOTE · 0 WARNING · 0 ERROR · 0 FAILURE
OK2026-06-09
13 OK · 0 NOTE · 0 WARNING · 0 ERROR · 0 FAILURE
ERROR2026-06-08
12 OK · 0 NOTE · 0 WARNING · 1 ERROR · 0 FAILURE
OK2026-04-25
12 OK · 0 NOTE · 0 WARNING · 0 ERROR · 0 FAILURE
NOTE2026-04-22
13 OK · 1 NOTE · 0 WARNING · 0 ERROR · 0 FAILURE

Show 2 earlier snapshots

ERROR2026-04-18
12 OK · 1 NOTE · 0 WARNING · 1 ERROR · 0 FAILURE
NOTE2026-03-10
13 OK · 1 NOTE · 0 WARNING · 0 ERROR · 0 FAILURE

Documentation

READMEYes · 116 wordsVignettesNopkgdown siteNoNEWSYes · 100% structuredCode of conductNoContributing guideNo

Examples that run: 100%
Documented parameters: 94%
Return-value docs: 95%
References docs: 20%

Downloads

4.5K

CRAN downloads in the past year

Rank #9,379 · ~12/day · ~372/mo

Releases R versions

Daily download trend is not available in this view yet.

46430 days

1.2K90 days

4.5K1 year

Compare downloads with other packages →

Also on422 r2u27 autocran21 c2d4u

Dependencies

Declared dependencies

13 external dependencies (excludes base and recommended)

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.

Code & Tests

Code Composition

R 13,392 (60%)Rd 4,042 (18%)C 3,970 (18%)C++ 1,101 (5%)Other 2 (0%)

Code characteristics

Object systems

S350

Cyclomatic complexity: 1.0 median / 15 max
Test cases: 185 / 0.85 per code line

Test coverage

Line coverage

83%

Expression

82.0%

Tests / Examples

83.0% / 59% ex

Functions

295 87 exported

Complexity

2.7 avg / 15 max

Call network

295 nodes / 426 edges

Call graph

Open call graph →

Loading call graph…

Lowest coverage

295 functions

Function	Cyclo	Coverage
evalfrbe exp	5	0%
raisedcos exp	7	0%
slices exp	8	0%
triangle exp	7	0%
.printCtx	1	0%
.singleRaisedcos	7	0%

People & History

People (1)

Maintainer (1)

Michal Burda

Author, Maintainer

Authors (1)

Michal Burda

Author, Maintainer

Package Timeline

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

2.4.0Latest
2026-07-03 · current release · diff ↗
R
R 4.6.0 released · 2026-04-24
2.3.1
2025-12-16 · diff ↗
2.3.0
2025-06-27 · diff ↗
R
R 4.5.0 released · 2025-04-11
2.2.1
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
2022-09-08 · diff ↗
R
R 4.2.0 released · 2022-04-22
2.1.2
2021-08-23 · diff ↗
R
R 4.1.0 released · 2021-05-18
2.1.1
2020-11-04 · diff ↗
2.1.0
2020-10-15 · diff ↗
2.0.1
2020-05-19 · diff ↗
R
R 4.0.0 released · 2020-04-24

Show 16 earlier events

2.0
2020-02-11 · diff ↗
R
R 3.6.0 released · 2019-04-26
1.4.2
2018-08-01 · diff ↗
unarchivedReturned to CRAN
2018-08-01
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
2018-04-12 · diff ↗
1.4
2017-04-25 · diff ↗
R
R 3.4.0 released · 2017-04-21
R
R 3.3.0 released · 2016-05-03
1.3
2016-04-22 · diff ↗
1.2
2015-06-18 · diff ↗
1.1
2015-06-03 · diff ↗
R
R 3.2.0 released · 2015-04-16
1.0
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: 515 KB
Installed size: not tracked yet
With dependencies: not tracked yet

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