chopper

1.0

Changepoint-Aware Ensemble for Probabilistic Modeling

0packages depend

6.8Kdownloads / year

85.4%test coverage

13/13checks pass

Overview

About

Maintained by Giancarlo VercellinoFirst published 2025-05-271 releasesCRAN page ↗

Implements a changepoint-aware ensemble forecasting algorithm that combines Theta, TBATS (Trigonometric, Box-Cox transformation, ARMA errors, Trend, Seasonal components), and ARFIMA (AutoRegressive, Fractionally Integrated, Moving Average) using a product-of-experts approach for robust probabilistic prediction.

Install

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

install.packages("chopper", 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-chopper

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-chopper

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-chopper

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

Health

CRAN checks

13OK

Slowest check: 4.7 min · r-devel-linux-x86_64-fedora-clang

Code health

Yes

Tests · ratio 0.14

85.4%

Coverage · measured lines

100%

Documentation · exports

Dependencies · direct

Check history

OK2026-06-09
13 OK · 0 NOTE · 0 WARNING · 0 ERROR · 0 FAILURE
ERROR2026-06-08
12 OK · 0 NOTE · 0 WARNING · 1 ERROR · 0 FAILURE
OK2026-03-10
14 OK · 0 NOTE · 0 WARNING · 0 ERROR · 0 FAILURE

Documentation

READMENoVignettesNopkgdown siteNoNEWSYes · 67% structuredCode of conductNoContributing guideNo

Examples that run: 50%
Documented parameters: 100%
Return-value docs: 100%
References docs: 0%

Downloads

6.8K

CRAN downloads in the past year

Rank #7,626 · ~19/day · ~564/mo

Releases R versions

Daily download trend is not available in this view yet.

26630 days

1.3K90 days

6.8K1 year

Compare downloads with other packages →

Also on116 r2u

Dependencies

Declared dependencies

14 external dependencies (excludes base and recommended)

Depends (1)

R >= 2.10

Imports (12)

normalp purrr ald evd (>= 2.3-6.1)GeneralizedHyperbolic fGarch (>= 4022.89)forecast imputeTS changepoint lubridate ggplot2 scales (>= 1.3.0)

LinkingTo (0)

none

Suggests (2)

knitr testthat

Enhances (0)

none

Dependency license breakdown →

Reverse dependencies

0direct

0indirect

Nothing depends on this yet.

Code & Tests

Datasets

People & History

People (1)

Maintainer (1)

Giancarlo Vercellino

Author, Maintainer, Copyright holder

Authors (1)

Giancarlo Vercellino

Author, Maintainer, Copyright holder

Giancarlo Vercellino

Author, Maintainer, Copyright holder

Package Timeline

1 release. R releases are shown for context.

R
R 4.6.0 released · 2026-04-24
1.0Latest
2026-03-10 · current release
R
R 4.5.0 released · 2025-04-11

Package metadata

First published: 2025-05-27
Total releases: 1 / 1 yrs
License: GPL-3 OSI
Minimum R: ≥ 2.10
Bundled data: 29 KB / 1 file
Download size: 39 KB
Installed size: not tracked yet
With dependencies: not tracked yet

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