R Observatory: Metrics for flexFitR version 1.2.4

Balamuta, James Joseph

doi:10.5281/zenodo.21843040

flexFitR

1.2.4Package record

Flexible Non-Linear Least Square Model Fitting

0packages depend

3.6Kdownloads / year

–test coverage

13/13flavors OK

Overview

About

Maintained by Johan AparicioCRAN page ↗GitHub ↗Website ↗Issues ↗

Provides tools for flexible non-linear least squares model fitting using general-purpose optimization techniques. The package supports a variety of optimization algorithms, including those provided by the 'optimx' package, making it suitable for handling complex non-linear models. Features include parallel processing support via the 'future' and 'foreach' packages, comprehensive model diagnostics, and visualization capabilities. Implements methods described in Nash and Varadhan (2011, doi:10.18637/jss.v043.i09).

Changes in 1.2.4

New features

Added a new vignette, Modeling soybean canopy cover.
Added the example dataset dt_soybean_22, containing soybean canopy-cover time-series data from Keller et al. (2026).
The print() method for modeler objects now reports the parameter box constraints used during model fitting.

Bug fixes

plot.modeler() no longer produces the "Ignoring unknown labels" message

with ggplot2 >= 4.0 for plot types 4, 5, and 6. Legend labels are now added

only when the corresponding aesthetics are mapped.

From NEWS.md in the release

Install

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

install.packages("flexFitR", 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("AparicioJohan/flexFitR")

Development version from AparicioJohan/flexFitR. 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-flexfitr

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-flexFitR

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-flexFitR

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: 7.3 min · r-oldrel-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
OK14 OK2026-03-10

Advisories

none known

How this is measured·How advisories are found

Documentation

In release 1.2.4

READMEYes · 388 wordsVignettesYes · 6 · dynamicNEWSYes · 100% structured · mentions 1.2.4Citation fileNoWebsiteYes · pkgdown

Description cites a JSS article

Help pages: 55 (10 internal)includes a package overview page
Examples that run: 100%51 run in a plain check
Exported functions with examples: 97%
Documented parameters: 99%
Return-value docs: 97%
Help pages citing references: 2%

Vignettes (6)

How these are measured

Downloads

3.6K

CRAN downloads in the past year

Rank #9,049 · ~10/day · ~304/mo

Releases R versions

Daily download trend is not available in this view yet.

41330 days

1K90 days

3.6K1 year

Compare downloads with other packages →

Also on107 r2u7 autocran

How downloads are counted

Repository

apariciojohan/flexfitr ↗Account: AparicioJohan

9Stars

1Forks

0Open issues

0Open PRs

4Releases

307Commits

3Commit identities

nlsoptimization

307 commits · Last activity 2026-10-15 · +12.5% stars, 30d

Responsiveness

How these are sampled

PRs merged (all time): 100%
Median days to close, 50 most recently updated closed issues: 2
Median days to close, 50 most recently updated closed PRs: 0

Stars over time

2025-08-13 · 62026-10-16 · 9

How these are measured

PracticesBeta

7 development-tooling and community-health practices detected across 5 families in the upstream repository

Checks run against github.com/apariciojohan/flexfitr on 2026-10-11.

Governance and community (1)

Code of conduct

Docs source (3)

README.Rmdpkgdown

GitHub Pages site last deployed 2026-09-09

pkgdown site last built 2026-09-09

Reproducibility and dev environment (1)

data-raw/

CRAN release process (1)

cran-comments.md

Show all practicesHide 1 practice

Lint, format, editor (1)

RStudio project

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

Dependencies

Declared dependencies

23 external dependencies (excludes base and recommended)

Installing flexFitR adds 104 packages (47 with compiled code, 100 MB of source tarballs). Heaviest: stringi 11 MB, ggplot2 6.0 MB, data.table 5.7 MB.

Depends (1)

R >= 4.1

Imports (13)

agriutilities doFuture dplyr foreach future ggplot2 numDeriv optimx progressr rlang subplex tibble tidyr

LinkingTo (0)

none

Suggests (10)

BB dfoptim ggpubr kableExtra knitr lbfgsb3c marqLevAlg purrr rmarkdown ucminf

Enhances (0)

none

Dependency license breakdown →

Reverse dependencies

0direct

0indirect

Nothing depends on this yet.

How these are counted

Code & Tests

Datasets

People & History

People (3)

Johan Aparicio

Maintainer since 1.0.0 (2025), Author

Jeffrey Endelman

Author

University of Wisconsin Madison

Copyright holder

Releases (7)

Pick two releases to compare their code metrics.

1.2.4Latest
record
2026-08-21 · current release · diff ↗
1.2.3
record
2026-06-11 · diff ↗
R
R 4.6.0 released · 2026-04-24
1.2.2
record
2026-01-27 · diff ↗ ·
removed 1 export
fn_lin_pl_lin2

added 3 exports
fn_lll, fn_lpl, fn_qpl
unarchivedReturned to CRAN
2025-11-04
1.2.1
record
2025-11-04 · diff ↗
archivedRemoved from CRAN
2025-10-15
requires archived package 'agriutilities'
1.2.0
record
2025-04-16 · diff ↗ ·
removed 3 exports
fn_exp1_exp, fn_exp1_lin, fn_linear_sat

added 15 exports
.delta_method, .delta_method_auc, .delta_method_deriv, .delta_method_gen, compute_tangent, ff, ff_auc, ff_deriv, fn_exp_exp, fn_exp_lin, fn_lin_logis, fn_lin_plat, fn_quad_pl_sm, fn_quad_plat, inverse_predict
R
R 4.5.0 released · 2025-04-11
1.1.0
record
2025-02-21 · diff ↗ ·
added 2 exports
augment, performance
1.0.0
record
2025-01-20
R
R 4.4.0 released · 2024-04-24

Package metadata

First published: 2025-01-20
Total releases: 7 / 1 yrs
License: MIT + file LICENSE OSI
Minimum R: ≥ 4.1
Bundled data: 53 KB / 3 files
Download size: 861 KB

Cite

Cite this package

Run in R for the authors' preferred citation:

citation("flexFitR")

Format

Aparicio, J., University of Wisconsin Madison, & Endelman, J. (2026). flexFitR: Flexible Non-Linear Least Square Model Fitting (Version 1.2.4) [Computer software]. https://doi.org/10.32614/CRAN.package.flexFitR

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 flexFitR version 1.2.4 [Data set]. HJJB, LLC. Data release v2026-10-18. https://doi.org/10.5281/zenodo.21843040

From data release v2026-10-18, which the citation names so these numbers can be found later. More on citing and the projects behind them.

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