R Observatory: Metrics for xegaDerivationTrees version 1.0.0.6

Balamuta, James Joseph

doi:10.5281/zenodo.21843040

xegaDerivationTrees

1.0.0.6Package record

Generating and Manipulating Derivation Trees

3packages depend

2.7Kdownloads / year

57.1%test coverage

13/13flavors OK

Overview

About

Maintained by Andreas Geyer-SchulzCRAN page ↗GitHub ↗

Derivation tree operations are needed for implementing grammar-based genetic programming and grammatical evolution: Generating a random derivation trees of a context-free grammar of bounded depth, decoding a derivation tree, choosing a random node in a derivation tree, extracting a tree whose root is a specified node, and inserting a subtree into a derivation tree at a specified node. These operations are necessary for the initialization and for decoders of a random population of programs, as well as for implementing crossover and mutation operators. Depth-bounds are guaranteed by switching to a grammar without recursive production rules. For executing the examples, the package 'BNF' is needed. The basic tree operations for generating, extracting, and inserting derivation trees as well as the conditions for guaranteeing complete derivation trees have been presented in Geyer-Schulz (1997, ISBN:978-3-7908-0830-X). The use of random integer vectors for the generation of derivation trees has been introduced in Ryan, C., Collins, J. J., and O'Neill, M. (1998) doi:10.1007/BFb0055930 for grammatical evolution.

Changes in 1.0.0.6

printDerivations and treeToDataFrames work with complete and incomplete derivation trees.

From NEWS in the release

Install

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

install.packages("xegaDerivationTrees", 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("ageyerschulz/xegaDerivationTrees")

Development version from ageyerschulz/xegaDerivationTrees. 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-xegaderivationtrees

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-xegaDerivationTrees

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-xegaDerivationTrees

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: 1.1 min · r-oldrel-windows-x86_64

Status changes

OK13 OK2026-08-04
NOTE12 OK, 1 NOTE2026-08-01
OK13 OK2026-06-08
WARNING12 OK, 1 WARNING2026-06-07
OK14 OK2026-03-10

Advisories

none known

How this is measured·How advisories are found

Documentation

In release 1.0.0.6

READMEYes · 250 wordsVignettesNoNEWSYes · 67% structured · mentions 1.0.0.6Citation fileNoWebsitenot declared in DESCRIPTION

Help pages: 40includes a package overview page
Examples that run: 100%39 run in a plain check
Exported functions with examples: 100%
Documented parameters: 100%
Return-value docs: 100%
Help pages citing references: 3%

How these are measured

Downloads

2.7K

CRAN downloads in the past year

Rank #20,862 · ~7/day · ~224/mo

Releases R versions

Daily download trend is not available in this view yet.

27430 days

62490 days

2.7K1 year

Compare downloads with other packages →

Also on86 r2u7 autocran

How downloads are counted

Repository

ageyerschulz/xegaderivationtrees ↗Account: ageyerschulz

0Stars

0Forks

0Open issues

0Open PRs

0Releases

Last activity 2026-09-07

Responsiveness

not measured

How these are measured

PracticesBeta

Checks run against github.com/ageyerschulz/xegaderivationtrees on 2026-10-11.

No development-tooling practices detected in the upstream repository.

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

Dependencies

Declared dependencies

2 external dependencies (excludes base and recommended)

Installing xegaDerivationTrees adds 1 package (0 with compiled code, 24 KB of source tarballs). Heaviest: xegaBNF 24 KB.

Depends (0)

none

Imports (1)

xegaBNF

LinkingTo (0)

none

Suggests (1)

testthat

Enhances (0)

none

Dependency license breakdown →

Reverse dependencies

3direct

0indirect

Imports 3

Depends, Imports or LinkingTo, most downloaded first

xegaGpGene xegaGeGene xega

How these are counted

Code & Tests

People & History

People (1)

Andreas Geyer-Schulz

Author, Maintainer since 1.0.0.0 (2024)

Releases (2)

Pick two releases to compare their code metrics.

R
R 4.6.0 released · 2026-04-24
1.0.0.6Latest
record
2025-04-16 · current release · diff ↗ ·
added 10 exports
addE, addV, decodeAndFixDT, decodeSymVec, generateCDT, newE, newV, printDerivations, treeProbability, treeToDataFrames
R
R 4.5.0 released · 2025-04-11
R
R 4.4.0 released · 2024-04-24
1.0.0.0
record
2024-02-13
R
R 4.3.0 released · 2023-04-21

Package metadata

First published: 2024-02-13
Total releases: 2 / 2 yrs
License: MIT + file LICENSE OSI
Download size: 25 KB

Cite

Cite this package

Run in R for the authors' preferred citation:

citation("xegaDerivationTrees")

Format

Geyer-Schulz, A. (2025). xegaDerivationTrees: Generating and Manipulating Derivation Trees (Version 1.0.0.6) [Computer software]. https://doi.org/10.32614/CRAN.package.xegaDerivationTrees

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 xegaDerivationTrees version 1.0.0.6 [Data set]. HJJB, LLC. Data release v2026-10-18. https://doi.org/10.5281/zenodo.21843040

From data release v2026-10-18, which the citation names so these numbers can be found later. More on citing and the projects behind them.

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