R Observatory: Metrics for FCO version 2.0.2

Balamuta, James Joseph

doi:10.5281/zenodo.21843040

FCO

2.0.2Package record

Flexible Cutoffs for Model Fit Evaluation in Covariance-Based Structural Models

0packages depend

64.2Kdownloads / year

43.4%test coverage

12/13flavors OK

Overview

About

Maintained by Thomas NiemandCRAN page ↗GitHub ↗Website ↗

A toolbox to derive flexible cutoffs for fit indices in 'Covariance-based Structural Equation Modeling' based on the paper by 'Niemand & Mai (2018)' doi:10.1007/s11747-018-0602-9. Flexible cutoffs are an alternative to fixed cutoffs - rules-of-thumb - regarding an appropriate cutoff for fit indices such as 'CFI' or 'SRMR'. It has been demonstrated that these flexible cutoffs perform better than fixed cutoffs in grey areas where misspecification is not easy to detect. The package provides an alternative to the tool at https://flexiblecutoffs.org as it allows to tailor flexible cutoffs to a given dataset and model, which is so far not available in the tool. The package simulates fit indices based on a given dataset and model and then estimates the flexible cutoffs. Some useful functions, e.g., to determine the 'GoF-' or 'BoF-nature' of a fit index, are provided. So far, additional options for a relative use (is a model better than another?) are provided in an exploratory manner.

Changes in 2.0.2

Small changes to solve CRAN check errors on some platforms.

------------------------------------------------------------------------

From NEWS.md in the release

Install

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

install.packages("FCO", 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("ThomasNiemand/FCO")

Development version from ThomasNiemand/FCO. 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-fco

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-FCO

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-FCO

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

1ERROR12OK

Check messages

ERRORtestsr-oldrel-macos-arm64

Running ‘testthat.R’ [51s/28s]
Running the tests in ‘tests/testthat.R’ failed.
Complete output:
  > library(testthat)
  > library(FCO)
  > 
  > test_check("FCO")
  This is lavaan 0.7-3
  lavaan is FREE software! Please report any bugs.
  Constraining is selected as the discriminant validity testing option given the provided arguments.
  Constraining is selected as the discriminant validity testing option given the provided arguments.
  Constraining is selected as the discriminant validity testing option given the provided arguments.
  Merging is selected as the discriminant validity testing option given the provided arguments.
  Merging is selected as the discriminant validity testing option given the provided arguments.
  Constraining is selected as the discriminant validity testing option given the provided arguments.
  
   *** caught segfault ***
  address 0x110, cause 'invalid permissions'
  
   *** caught segfault ***
  address 0x110, cause 'invalid permissions'
  
  Traceback:
  
...[truncated]...
 ── Error ('test-recommend_dv.R:57:13'): Is the proper dv technique used? constraining? ──
  Error in `recommend_dv(fits = fits.dv.con, )`: Only dual model fit indices are supported so far for this function. Please revise or use flex_co.
  Backtrace:
      ▆
   1. ├─base::suppressWarnings(recommend_dv(fits = fits.dv.con, )) at test-recommend_dv.R:57:13
   2. │ └─base::withCallingHandlers(...)
   3. └─FCO::recommend_dv(fits = fits.dv.con, )
  ── Error ('test-recommend_dv.R:65:13'): Is the result rounded properly? ────────
  Error in `recommend_dv(fits = fits.dv.con, digits = 5)`: Only dual model fit indices are supported so far for this function. Please revise or use flex_co.
  Backtrace:
      ▆
   1. ├─base::suppressWarnings(recommend_dv(fits = fits.dv.con, digits = 5)) at test-recommend_dv.R:65:13
   2. │ └─base::withCallingHandlers(...)
   3. └─FCO::recommend_dv(fits = fits.dv.con, digits = 5)
  
  [ FAIL 9 | WARN 8 | SKIP 0 | PASS 65 ]
  Error:
  ! Test failures.
  Execution halted

CRAN check page ↗

Slowest check: 4.7 min · r-oldrel-macos-x86_64

Status changes

ERROR12 OK, 1 ERRORNow
ERROR12 OK, 2 ERROR2026-03-10

Advisories

none known

How this is measured·How advisories are found

Documentation

In release 2.0.2

READMEYes · 420 wordsVignettesYes · 1 · dynamicNEWSYes · 67% structured · mentions 2.0.2Citation fileNoWebsiteYes

Help pages: 9
Examples that run: 56%5 run in a plain check · 4 only when donttest examples are enabled (R CMD check --as-cran)
Exported functions with examples: 100%
Documented parameters: 100%
Return-value docs: 100%
Help pages citing references: 44%

Vignettes (1)

FCO HTML

How these are measured

Downloads

64.2K

CRAN downloads in the past year

Rank #12,860 · ~176/day · ~5.3K/mo

Releases R versions

Daily download trend is not available in this view yet.

36630 days

88090 days

64.2K1 year

Compare downloads with other packages →

Also on87 r2u4 autocran

How downloads are counted

Repository

thomasniemand/fco ↗Account: ThomasNiemand

0Stars

0Forks

0Open issues

0Open PRs

0Releases

Last activity 2026-02-25

Responsiveness

not measured

How these are measured

PracticesBeta

2 development-tooling and community-health practices detected across 2 families in the upstream repository

Checks run against github.com/thomasniemand/fco on 2026-10-21.

Docs source (1)

README.Rmd

CRAN release process (1)

cran-comments.md

How this is detected·Detection ruleset v4 (2026-10-20)

Dependencies

Declared dependencies

18 external dependencies (excludes base and recommended)

Installing FCO adds 113 packages (58 with compiled code, 79 MB of source tarballs). Heaviest: stringi 11 MB, TH.data 8.2 MB, ggplot2 6.0 MB.

Depends (1)

R >= 4.4.0

Imports (16)

checkmate cutpointr data.table doParallel dplyr foreach ggplot2 lavaan overlappingparallelPoisBinOrdNor psych rcompanion simstandard stringr tidyr

LinkingTo (0)

none

Suggests (4)

knitrMASSrmarkdown testthat

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 (4)

Thomas Niemand

Author, Maintainer since 0.7.2 (2022)

Andreas Falke

Contributor · added in 2.0.0

Robert Mai

Contributor

Nadine Schröder

Contributor · added in 2.0.0

Releases (5)

Pick two releases to compare their code metrics.

R
R 4.6.0 released · 2026-04-24
2.0.2Latest
record
2026-02-26 · current release · diff ↗
2.0.1
record
2026-02-13 · diff ↗
2.0.0
record
2025-09-25 · diff ↗ ·
removed 1 export
index_guess

added 3 exports
flex_co2, gen_fit2, plot_fit2
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
0.8.0
record
2023-03-17 · diff ↗
R
R 4.2.0 released · 2022-04-22
0.7.2
record
2022-02-11
R
R 4.1.0 released · 2021-05-18

Package metadata

First published: 2022-02-11
Total releases: 5 / 4 yrs
License: GPL (>= 3) OSI
Minimum R: ≥ 4.4.0
Bundled data: 83 KB / 1 file
Download size: 182 KB

Cite

Cite this package

Run in R for the authors' preferred citation:

citation("FCO")

Format

Niemand, T., Falke, A., Mai, R., & Schröder, N. (2026). FCO: Flexible Cutoffs for Model Fit Evaluation in Covariance-Based Structural Models (Version 2.0.2) [Computer software]. https://doi.org/10.32614/CRAN.package.FCO

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 FCO version 2.0.2 [Data set]. HJJB, LLC. Data release v2026-10-23. https://doi.org/10.5281/zenodo.21843040

From data release v2026-10-23, which the citation names so these numbers can be found later. More on citing and the projects behind them.

Report a problem with this page →