nanoparquet

0.5.1

Read and Write 'Parquet' Files

24packages depend

267.3Kdownloads / year

92.7%test coverage

13/13checks pass

Overview

About

Maintained by Gábor CsárdiFirst published 2024-05-309 releasesCRAN page ↗GitHub ↗

Self-sufficient reader and writer for flat 'Parquet' files. Can read most 'Parquet' data types. Can write many 'R' data types, including factors and temporal types. See docs for limitations.

Install

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

install.packages("nanoparquet", 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("r-lib/nanoparquet")

Development version from r-lib/nanoparquet. 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-nanoparquet

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-nanoparquet

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-nanoparquet

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

Health

CRAN checks

13OK

Slowest check: 6.3 min · r-devel-linux-x86_64-fedora-clang

Code health

Yes

Tests · ratio 10.31

92.7%

Coverage · measured lines

100%

Documentation · exports

Dependencies · direct

Check history

OK2026-06-08
12 OK · 0 NOTE · 0 WARNING · 0 ERROR · 1 FAILURE
ERROR2026-06-07
12 OK · 0 NOTE · 0 WARNING · 1 ERROR · 0 FAILURE
OK2026-04-21
14 OK · 0 NOTE · 0 WARNING · 0 ERROR · 0 FAILURE
ERROR2026-04-15
13 OK · 0 NOTE · 0 WARNING · 1 ERROR · 0 FAILURE
OK2026-04-14
14 OK · 0 NOTE · 0 WARNING · 0 ERROR · 0 FAILURE

Show 1 earlier snapshots

ERROR2026-03-10
12 OK · 1 NOTE · 0 WARNING · 1 ERROR · 0 FAILURE

Documentation

READMEYes · 557 wordsVignettesNopkgdown siteNoNEWSYes · 100% structuredCode of conductNoContributing guideNo

Examples that run: 100%
Documented parameters: 98%
Return-value docs: 90%
References docs: 0%

Downloads

267.3K

CRAN downloads in the past year

Rank #839 · ~732/day · ~22.3K/mo

Releases R versions

Daily download trend is not available in this view yet.

19.3K30 days

62.2K90 days

267.3K1 year

Compare downloads with other packages →

Also on7.7K r2u32 autocran11K conda_forge

Repository

GitHub ↗ r-lib/nanoparquet

84Stars

8Forks

32Open issues

0Open PRs

9Releases

836Commits

8Contributors

parquetr

836 commits · Last activity 2026-06-29 · +1.2% stars, 30d

Stars over time

2025-07-17 · 692026-07-07 · 84

Repository practices

Upstream repositoryBeta

5 development-tooling and community-health practices detected across 3 families in the upstream repository

Checks run against github.com/r-lib/nanoparquet on 2026-07-19.

Continuous integration (1)

GitHub Actions

Lint, format, editor (2)

AirVS Code

Coverage (2)

Codecov.covrignore

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

Dependencies

Declared dependencies

14 external dependencies (excludes base and recommended)

Depends (1)

R >= 4.0.0

Imports (0)

none

LinkingTo (0)

none

Suggests (14)

arrow bit64 blob DBI duckdb hms mockery pillar processx rprojroot spelling testthat tzdb withr

Enhances (0)

none

Dependency license breakdown →

Reverse dependencies

24direct

9indirect

CohortContrast artoo bigrquery datasetviewer rerddap tidyfinance unsum whep Rdatasets aurora carbondata corella crawlee datawizard ibawds libr marginaleffects modelbased pins plumber2 rio rtemis tarchetypes tidylearn

Code & Tests

Code Composition

C++ 68,124 (44%)C 51,379 (33%)Markdown 21,840 (14%)R 9,841 (6%)Rd 1,492 (1%)Other 925 (1%)Python 312 (0%)Rust 15 (0%)

Code characteristics

Object systems

S31

Cyclomatic complexity: 2.0 median / 17 max
Test cases: 266 / 10.31 per code line

Test coverage

Line coverage

93%

Expression

92.0%

Tests / Examples

92.7% / – ex

Functions

3776 12 exported

Complexity

3.4 avg / 17 max

Call network

3776 nodes / 4322 edges

Call graph

Open call graph →

Loading call graph…

Lowest coverage

3776 functions

Function	Cyclo	Coverage
dbp_decode_int64	1	0%
dict_encode	1	0%
dict_encode_idx	1	0%
gzip_compress	1	0%
lgl_avg_run_length	1	0%
pack_bits	2	0%

People & History

People (9)

Maintainer (1)

Gábor Csárdi

Author, Maintainer

Authors (2)

Gábor Csárdi

Author, Maintainer

Hannes Mühleisen

Author, Copyright holder

Hannes Mühleisen

Author, Copyright holder

Apache Software Foundation

Tenacious Software LLC

Valve Software

Package Timeline

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

R
R 4.6.0 released · 2026-04-24
0.5.1Latest
2026-04-20 · current release · diff ↗
0.5.0
2026-04-11 · diff ↗
0.4.3
2025-12-17 · diff ↗
R
R 4.5.0 released · 2025-04-11
0.4.2
2025-02-22 · diff ↗
0.4.1
2025-02-10 · diff ↗
0.4.0
2025-01-29 · diff ↗
0.3.1
2024-07-01 · diff ↗
0.3.0
2024-06-17 · diff ↗
0.2.0
2024-05-30
R
R 4.4.0 released · 2024-04-24

Package metadata

First published: 2024-05-30
Total releases: 9 / 2 yrs
License: MIT + file LICENSE OSI
Minimum R: ≥ 4.0.0
Download size: 1.1 MB
Installed size: not tracked yet
With dependencies: not tracked yet

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