R Observatory: Metrics for IPEC version 1.1.2

Balamuta, James Joseph

doi:10.5281/zenodo.21843040

IPEC

1.1.2Package record

Root Mean Square Curvature Calculation

0packages depend

2.9Kdownloads / year

–test coverage

13/13flavors OK

Overview

About

Maintained by Peijian ShiCRAN page ↗

Calculates the RMS intrinsic and parameter-effects curvatures of a nonlinear regression model. The curvatures are global measures of assessing whether a model/data set combination is close-to-linear or not. See Bates and Watts (1980) doi:10.1002/9780470316757 and Ratkowsky and Reddy (2017) doi:10.1093/aesa/saw098 for details.

Install

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

install.packages("IPEC", 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-ipec

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-IPEC

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-IPEC

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: 1.3 min · r-oldrel-windows-x86_64

Status changes

OK13 OK2026-08-05
NOTE12 OK, 1 NOTE2026-08-01
OK14 OK2026-03-10

Advisories

none known

How this is measured·How advisories are found

Documentation

In release 1.1.2

READMENoVignettesNoNEWSNoCitation fileNoWebsitenot declared in DESCRIPTION

Help pages: 15includes a package overview page
Examples that run: 100%15 run in a plain check
Exported functions with examples: 100%
Documented parameters: not tracked
Return-value docs: not tracked
Help pages citing references: 100%

How these are measured

Downloads

2.9K

CRAN downloads in the past year

Rank #14,009 · ~8/day · ~243/mo

Releases R versions

Daily download trend is not available in this view yet.

39830 days

84490 days

2.9K1 year

Compare downloads with other packages →

Also on70 r2u6 autocran

How downloads are counted

Dependencies

Declared dependencies

1 external dependency (excludes base and recommended)

Installing IPEC adds 1 package (0 with compiled code, 74 KB of source tarballs). Heaviest: numDeriv 74 KB.

Depends (1)

R >= 4.2.0

Imports (2)

numDerivMASS

LinkingTo (0)

none

Suggests (0)

none

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)

Peijian Shi

Author, Maintainer since 0.0.8 (2017)

Yang Li

Author · added in 0.1.1

David A. Ratkowsky

Author

Peter M. Ridland

Author

Listed in earlier versions (4)

Show 4 peopleHide 4 people

Peter Ridland

no longer listed · 0.0.8 to 0.1.3

Li

no longer listed · 1.0.1 to 1.1.2

Ratkowsky

no longer listed · 1.0.1 to 1.1.2

Ridland

no longer listed · 1.0.1 to 1.1.2

Releases (14)

Pick two releases to compare their code metrics.

R
R 4.6.0 released · 2026-04-24
1.1.2Latest
record
2025-09-26 · current release · diff ↗
1.1.1
record
2025-07-23 · diff ↗
R
R 4.5.0 released · 2025-04-11
R
R 4.4.0 released · 2024-04-24
1.1.0
record
2024-01-13 · diff ↗
1.0.6
record
2023-12-02 · diff ↗
1.0.5
record
2023-10-30 · diff ↗
1.0.4
record
2023-08-22 · diff ↗
R
R 4.3.0 released · 2023-04-21
1.0.3
record
2022-05-24 · diff ↗
1.0.1
record
2022-05-17 · diff ↗
R
R 4.2.0 released · 2022-04-22
R
R 4.1.0 released · 2021-05-18
0.1.3
record
2020-06-27 · diff ↗
R
R 4.0.0 released · 2020-04-24

Show 8 earlier eventsHide 8 earlier events

R
R 3.6.0 released · 2019-04-26
0.1.2
record
2018-08-19 · diff ↗
0.1.1
record
2018-08-19 · diff ↗
0.1.0
record
2018-07-03 · diff ↗
R
R 3.5.0 released · 2018-04-23
0.0.9
record
2017-05-14 · diff ↗
0.0.8
record
2017-05-10
R
R 3.4.0 released · 2017-04-21

Package metadata

First published: 2017-05-10
Total releases: 14 / 9 yrs
License: GPL (>= 2) OSI
Minimum R: ≥ 4.2.0
Bundled data: 48 KB / 4 files
Download size: 89 KB

Cite

Cite this package

Run in R for the authors' preferred citation:

citation("IPEC")

Format

Shi, P., Li, Y., Ratkowsky, D. A., & Ridland, P. M. (2025). IPEC: Root Mean Square Curvature Calculation (Version 1.1.2) [Computer software]. https://doi.org/10.32614/CRAN.package.IPEC

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 IPEC version 1.1.2 [Data set]. HJJB, LLC. Data release v2026-10-24. https://doi.org/10.5281/zenodo.21843040

From data release v2026-10-24, which the citation names so these numbers can be found later. More on citing and the projects behind them.

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