R Observatory: Metrics for rnndescent version 0.2.0

Balamuta, James Joseph

doi:10.5281/zenodo.21843040

rnndescent

0.2.0Package record

Nearest Neighbor Descent Method for Approximate Nearest Neighbors

2packages dependsuggested by 1

41.2Kdownloads / year

96.3%test coverage

13/13flavors OK

Overview

About

Maintained by James MelvilleCRAN page ↗GitHub ↗Website ↗Issues ↗

The Nearest Neighbor Descent method for finding approximate nearest neighbors by Dong and co-workers (2010) doi:10.1145/1963405.1963487. Based on the 'Python' package 'PyNNDescent' https://github.com/lmcinnes/pynndescent.

Changes in 0.2.0

New features

Add haversine metric for 2D latitude/longitude data in radians. This is

one of the metrics that was in PyNNDescent but I neglected to add to

rnndescent for its initial release. Thank you to

Josiah Parry whose request nudged me to fill

this gap (<https://github.com/jlmelville/rnndescent/issues/17>).

Bug fixes and minor improvements

Much improved input validation.
Non-dgCMatrix sparseMatrix inputs, such as dgRMatrix and dgTMatrix are

now normalized to dgCMatrix on input. Other matrices fail with a clearer error.

Fix for prepare_search_graph() sometimes over-pruning beyond max_degree.
Fix explicit-margin RP-tree builds for metric = "dice" and "hamming" to

Show all changes in 0.2.0Hide the rest of the changes in 0.2.0

use angular split geometry.

Fix for rpf_build(obs = "C") where default n_trees used the number of

features not the number of observations.

Fix nnd_knn() and graph_knn_query() sometimes failing to completely randomly fill

the initial search graph when needed.

Fix for prepare_search_graph(prune_reverse = TRUE) not pruning reverse edges

when diversify_prob = 0.

Fix for edge case when max_search_fraction would only result in one

calculation, but this distance was never used.

Fixes for k_occur() when using graphs with missing data and sparse graphs

with anti-hubs.

Verbose query summaries now report the correct minimum and average number of

distance calculations.

Minor parallel execution robustness improvements: errors propagate back to R

and some worker launches are avoided with small workloads.

Minor C++ portability improvements for CRAN builds and high-dimensional

logical metrics.

Some C++ changes to avoid a (probably false positive) gcc16 compiler warning

found by CRAN checks.

From NEWS.md in the release

Install

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

install.packages("rnndescent", 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("jlmelville/rnndescent")

Development version from jlmelville/rnndescent. 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-rnndescent

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-rnndescent

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-rnndescent

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: 6.0 min · r-devel-windows-x86_64

Status changes

OK13 OK2026-08-05
NOTE12 OK, 1 NOTE2026-08-01
OK13 OK2026-05-31
WARNING12 OK, 1 WARNING2026-05-13
OK12 OK2026-04-25

Show 3 earlier changesHide 3 earlier changes

NOTE12 OK, 2 NOTE2026-04-22
ERROR11 OK, 2 NOTE, 1 ERROR2026-04-18
NOTE12 OK, 2 NOTE2026-03-10

Advisories

none known

How this is measured·How advisories are found

Documentation

In release 0.2.0

README· In the repository, left out of the releaseVignettesYes · 7 · dynamicNEWSYes · 100% structured · mentions 0.2.0Citation fileNoWebsiteYes · pkgdown

The repository also keeps web-only articles.

Help pages: 18 (1 internal)includes a package overview page
Examples that run: 100%17 run in a plain check
Exported functions with examples: 100%
Documented parameters: 100%
Return-value docs: 100%
Help pages citing references: 61%

Vignettes (7)

How these are measured

Downloads

41.2K

CRAN downloads in the past year

Rank #2,225 · ~113/day · ~3.4K/mo

Releases R versions

Daily download trend is not available in this view yet.

2.4K30 days

7.7K90 days

41.2K1 year

Compare downloads with other packages →

Also on440 r2u9 autocran

How downloads are counted

Repository

jlmelville/rnndescent ↗Account: jlmelville

17Stars

2Forks

1Open issues

0Open PRs

23Releases

1,215Commits

3Commit identities

rapproximate-nearest-neighbor-search

License file reads as GPL-3.0 · 1,215 commits · Last activity 2026-10-19 · 0% stars, 30d · Default branch at 0.2.0.9000, ahead of CRAN 0.2.0 (checked 2026-10-11)

Responsiveness

How these are sampled

PRs merged (all time): 96%
Median days to close, 50 most recently updated closed issues: 168
Median days to close, 50 most recently updated closed PRs: 1

Stars over time

2025-04-25 · 122026-07-25 · 17

How these are measured

PracticesBeta

12 development-tooling and community-health practices detected across 6 families in the upstream repository

Checks run against github.com/jlmelville/rnndescent on 2026-10-11.

Continuous integration (2)

GitHub ActionsR CMD check workflow

The R CMD check workflow runs on Linux, macOS and Windows, and on R-devel

Docs source (3)

pkgdown

GitHub Pages site last deployed 2026-10-10 · The repository has a site deploy workflow

pkgdown site last built 2026-10-10

Coverage (1)

Coverage reporting (Codecov)

CRAN release process (1)

cran-comments.md

Show all practicesHide 2 practices

Automation and maintenance (1)

Dependabot

Lint, format, editor (4)

lintrLint workflowAirRStudio project

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

Dependencies

Declared dependencies

10 external dependencies (excludes base and recommended)

Installing rnndescent adds 4 packages (3 with compiled code, 16 MB of source tarballs). Heaviest: BH 14 MB, Rcpp 1.8 MB, dqrng 261 KB.

Depends (0)

none

Imports (4)

dqrngMatrixmethodsRcpp

LinkingTo (4)

BH dqrng Rcpp sitmo

Suggests (4)

covr knitr rmarkdown testthat

Enhances (0)

none

Dependency license breakdown →

Reverse dependencies

2direct

1indirect

Imports 2

Suggested by 1

Depends, Imports or LinkingTo, most downloaded first

bbknnR blocking

Suggests, most downloaded first

uwot

How these are counted

Code & Tests

People & History

People (3)

James Melville

Vitalie Spinu

Contributor

Ralf Stubner

Contributor · added in 0.1.5

Releases (7)

Pick two releases to compare their code metrics.

0.2.0Latest
record
2026-05-26 · current release · diff ↗
R
R 4.6.0 released · 2026-04-24
0.1.8
record
2025-09-05 · diff ↗
R
R 4.5.0 released · 2025-04-11
0.1.6
record
2024-05-14 · diff ↗
R
R 4.4.0 released · 2024-04-24
0.1.5
record
2024-04-18 · diff ↗
0.1.4
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2024-03-18 · diff ↗
0.1.3
record
2023-12-08 · diff ↗
0.1.1
record
2023-11-27
R
R 4.3.0 released · 2023-04-21

Package metadata

First published: 2023-11-27
Total releases: 7 / 3 yrs
License: GPL (>= 3) OSI
Download size: 349 KB

Cite

Cite this package

Run in R for the authors' preferred citation:

citation("rnndescent")

Format

Melville, J., Spinu, V., & Stubner, R. (2026). rnndescent: Nearest Neighbor Descent Method for Approximate Nearest Neighbors (Version 0.2.0) [Computer software]. https://doi.org/10.32614/CRAN.package.rnndescent

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 rnndescent version 0.2.0 [Data set]. HJJB, LLC. Data release v2026-10-19. https://doi.org/10.5281/zenodo.21843040

From data release v2026-10-19, which the citation names so these numbers can be found later. More on citing and the projects behind them.

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