zoo

1.8-15

S3 Infrastructure for Regular and Irregular Time Series (Z's Ordered Observations)

570packages depend

8.8Mdownloads / year

47.0%test coverage

7/13checks pass

Overview

About

Maintained by Achim ZeileisFirst published 2004-02-2071 releasesCRAN page ↗

An S3 class with methods for totally ordered indexed observations. It is particularly aimed at irregular time series of numeric vectors/matrices and factors. zoo's key design goals are independence of a particular index/date/time class and consistency with ts and base R by providing methods to extend standard generics.

Install

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

install.packages("zoo", 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-zoo

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-zoo

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-zoo

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

Health

CRAN checks

1ERROR5NOTE7OK

Failing flavors

NOTE r-devel-linux-x86_64-debian-clang
NOTE r-devel-linux-x86_64-debian-gcc
NOTE r-devel-linux-x86_64-fedora-clang
NOTE r-devel-linux-x86_64-fedora-gcc
NOTE r-devel-windows-x86_64
ERROR r-release-macos-arm64

Slowest check: 3.5 min · r-oldrel-windows-x86_64

Code health

Yes

Tests · ratio 1.37

47.0%

Coverage · measured lines

100%

Documentation · exports

Dependencies · direct

Check history

ERROR2026-04-27
11 OK · 0 NOTE · 0 WARNING · 1 ERROR · 0 FAILURE
OK2026-03-10
14 OK · 0 NOTE · 0 WARNING · 0 ERROR · 0 FAILURE

Documentation

READMENoVignettesYes · dynamicpkgdown siteNoNEWSYes · 33% structuredCode of conductNoContributing guideNo

Examples that run: 100%
Documented parameters: 85%
Return-value docs: 67%
References docs: 3%

Downloads

8.8M

CRAN downloads in the past year

Rank #87 · ~24.2K/day · ~735.6K/mo

Releases R versions

Daily download trend is not available in this view yet.

690.9K30 days

2.3M90 days

8.8M1 year

Compare downloads with other packages →

Also on61.6K r2u250 autocran401.7K conda_forge624 c2d4u

Dependencies

Declared dependencies

14 external dependencies (excludes base and recommended)

Depends (2)

R >= 3.1.0stats

Imports (4)

utilsgraphicsgrDeviceslattice

LinkingTo (0)

none

Suggests (14)

AER coda chron ggplot2 mondate scales stinepack strucchange timeDate timeSeries tinyplot tis tseries xts

Enhances (0)

none

Dependency license breakdown →

Reverse dependencies

570direct

2,053indirect

and 523 more packages.

Code & Tests

Code Composition

Other 5,126 (29%)R 4,970 (28%)Rd 4,084 (23%)Vignettes 2,940 (17%)C 465 (3%)

Code characteristics

Object systems

S3261

Cyclomatic complexity: 1.0 median / 101 max

Test coverage

Line coverage

47%

Expression

44.4%

Tests / Examples

47.0% / – ex

Functions

297 97 exported

Complexity

4.1 avg / 101 max

Call network

297 nodes / 341 edges

Call graph

Open call graph →

Loading call graph…

Lowest coverage

297 functions

Function	Cyclo	Coverage
MATCH.times exp	1	0%
Sys.yearmon exp	1	0%
Sys.yearqtr exp	1	0%
as.Date.ts exp	4	0%
as.yearmon.default exp	1	0%
as.zooreg.default exp	1	0%

People & History

People (5)

Maintainer (1)

Achim Zeileis

Author, Maintainer

Authors (3)

Achim Zeileis

Author, Maintainer

Gabor Grothendieck

Author · added in 0.1-2

Jeffrey A. Ryan

Author

Contributors (2)

Felix Andrews

Contributor · added in 1.6-3

Joshua M. Ulrich

Contributor

Listed in earlier versions (2)

Ryan

no longer listed · 1.7-0 to 1.8-15

Ulrich

no longer listed · 1.8-0 to 1.8-15

Package Timeline

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

R
R 4.6.0 released · 2026-04-24
1.8-15Latest
2025-12-15 · current release · diff ↗
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R 4.5.0 released · 2025-04-11
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R 4.4.0 released · 2024-04-24
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R 4.3.0 released · 2023-04-21
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R 4.2.0 released · 2022-04-22
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R 4.1.0 released · 2021-05-18
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R 4.0.0 released · 2020-04-24
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Show 87 earlier events

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R 2.1.0 released · 2005-04-18
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R 1.9.0 released · 2004-04-12
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R 1.8.0 released · 2003-10-08

Package metadata

First published: 2004-02-20
Total releases: 71 / 22 yrs
License: GPL-2 | GPL-3 OSI
Minimum R: ≥ 3.1.0
Download size: 788 KB
Installed size: not tracked yet
With dependencies: not tracked yet

Appears in task views

Econometrics Analysis of Ecological and Environmental Data Empirical Finance Missing Data Time Series Analysis

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