R Observatory: Metrics for itp version 1.2.2

Balamuta, James Joseph

doi:10.5281/zenodo.21843040

itp

1.2.2

The Interpolate, Truncate, Project (ITP) Root-Finding Algorithm

2packages depend

3.5Kdownloads / year

97.8%test coverage

13/13checks pass

Overview

About

Maintained by Paul J. NorthropFirst published 2022-06-076 releasesCRAN page ↗GitHub ↗

Implements the Interpolate, Truncate, Project (ITP) root-finding algorithm developed by Oliveira and Takahashi (2021) doi:10.1145/3423597. The user provides the function, from the real numbers to the real numbers, and an interval with the property that the values of the function at its endpoints have different signs. If the function is continuous over this interval then the ITP method estimates the value at which the function is equal to zero. If the function is discontinuous then a point of discontinuity at which the function changes sign may be found. The function can be supplied using either an R function or an external pointer to a C++ function. Tuning parameters of the ITP algorithm can be set by the user. Default values are set based on arguments in Oliveira and Takahashi (2021).

Install

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

install.packages("itp", 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("paulnorthrop/itp")

Development version from paulnorthrop/itp. 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-itp

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-itp

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-itp

RPMs auto-built from CRAN on openSUSE OBS (Tumbleweed).

Health

CRAN checks

13OK

Slowest check: 2.7 min · r-devel-windows-x86_64

Code health

Yes

Tests · ratio 0.94

97.8%

Coverage · measured lines

100%

Documentation · exports

1

Dependencies · direct

Check history

OK2026-08-05
13 OK · 0 NOTE · 0 WARNING · 0 ERROR · 0 FAILURE
NOTE2026-08-01
12 OK · 1 NOTE · 0 WARNING · 0 ERROR · 0 FAILURE
OK2026-04-22
14 OK · 0 NOTE · 0 WARNING · 0 ERROR · 0 FAILURE
ERROR2026-04-18
13 OK · 0 NOTE · 0 WARNING · 1 ERROR · 0 FAILURE
OK2026-03-10
14 OK · 0 NOTE · 0 WARNING · 0 ERROR · 0 FAILURE

Documentation

READMEYes · 445 wordsVignettesYes · dynamicpkgdown siteNoNEWSYes · 100% structuredCode of conductNoContributing guideNo

Examples that run: 100%
Documented parameters: 67%
Return-value docs: 100%
References docs: 38%

Downloads

3.5K

CRAN downloads in the past year

Rank #11,072 · ~10/day · ~295/mo

Releases R versions

Daily download trend is not available in this view yet.

24030 days

90090 days

3.5K1 year

Compare downloads with other packages →

Also on445 r2u15 autocran43 c2d4u

Repository

GitHub ↗ paulnorthrop/itp

13Stars

3Forks

0Open issues

0Open PRs

6Releases

208Commits

1Contributors

algorithmbracketingroot-findingitp-methoditp

License GPL-3.0 · 208 commits · Last activity 2026-01-24

Repository practices

Upstream repositoryBeta

4 development-tooling and community-health practices detected across 4 families in the upstream repository

Checks run against github.com/paulnorthrop/itp on 2026-08-09.

Continuous integration (1)

GitHub Actions

CRAN release process (1)

cran-comments.md

Docs source (1)

README.Rmd

Lint, format, editor (1)

RStudio project

How this is detected·Detection ruleset v1 (2026-07-18)

Dependencies

Declared dependencies

5 external dependencies (excludes base and recommended)

Depends (0)

none

Imports (1)

Rcpp

LinkingTo (1)

Rcpp

Suggests (4)

knitr rmarkdownstatstestthat

Enhances (0)

none

Dependency license breakdown →

Reverse dependencies

2direct

0indirect

evmissing profileCI

Code & Tests

People & History

People (1)

Maintainer (1)

Paul J. Northrop

Author, Maintainer, Copyright holder

Authors (1)

Paul J. Northrop

Author, Maintainer, Copyright holder

Copyright holders (1)

Paul J. Northrop

Author, Maintainer, Copyright holder

Listed in earlier versions (1)

Paul J.

no longer listed · 1.0.0 to 1.2.2

Package Timeline

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

R
R 4.6.0 released · 2026-04-24
1.2.2Latest
2026-01-10 · current release · diff ↗
R
R 4.5.0 released · 2025-04-11
R
R 4.4.0 released · 2024-04-24
1.2.1
2023-12-02 · diff ↗
R
R 4.3.0 released · 2023-04-21
1.2.0
2022-07-16 · diff ↗
1.1.0
2022-07-02 · diff ↗
1.0.1
2022-06-14 · diff ↗
1.0.0
2022-06-07
R
R 4.2.0 released · 2022-04-22

Package metadata

First published: 2022-06-07
Total releases: 6 / 4 yrs
License: GPL (>= 2) OSI
Download size: 74 KB
Installed size: not tracked yet
With dependencies: not tracked yet

Appears in task views

Numerical Mathematics

Cite

Cite this package

Run in R for the authors' preferred citation:

citation("itp")

Format

Northrop, P. J. (2026). itp: The Interpolate, Truncate, Project (ITP) Root-Finding Algorithm (Version 1.2.2) [Computer software]. https://doi.org/10.32614/CRAN.package.itp

This is what citation() produces when a package has no citation file of its own. If it prints something else, use that.

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 itp version 1.2.2 [Data set]. HJJB, LLC. Data release v2026-08-13. https://doi.org/10.5281/zenodo.21843040

From data release v2026-08-13, which the citation names so these numbers can be found later. More on citing and the projects behind them.

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