sfcurve

1.0.1

2x2, 3x3 and Nxn Space-Filling Curves

0packages depend

2.9Kdownloads / year

15.6%test coverage

12/13checks pass

Overview

About

Maintained by Zuguang GuFirst published 2024-09-132 releasesCRAN page ↗GitHub ↗

Implementation of all possible forms of 2x2 and 3x3 space-filling curves, i.e., the generalized forms of the Hilbert curve https://en.wikipedia.org/wiki/Hilbert_curve, the Peano curve https://en.wikipedia.org/wiki/Peano_curve and the Peano curve in the meander type (Figure 5 in https://eudml.org/doc/141086). It can generates nxn curves expanded from any specific level-1 units. It also implements the H-curve and the three-dimensional Hilbert curve. See doi:10.48550/arXiv.2412.16962 for more details.

Install

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

install.packages("sfcurve", 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("jokergoo/sfcurve")

Development version from jokergoo/sfcurve. 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-sfcurve

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-sfcurve

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-sfcurve

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

Health

CRAN checks

1NOTE12OK

Failing flavors

NOTE r-devel-linux-x86_64-debian-gcc

Slowest check: 3.6 min · r-devel-linux-x86_64-fedora-clang

Code health

Yes

Tests · ratio 0.08

15.6%

Coverage · measured lines

100%

Documentation · exports

Dependencies · direct

Check history

NOTE2026-08-01
12 OK · 1 NOTE · 0 WARNING · 0 ERROR · 0 FAILURE
OK2026-04-22
14 OK · 0 NOTE · 0 WARNING · 0 ERROR · 0 FAILURE
ERROR2026-04-18
13 OK · 0 NOTE · 0 WARNING · 1 ERROR · 0 FAILURE
OK2026-04-16
14 OK · 0 NOTE · 0 WARNING · 0 ERROR · 0 FAILURE
NOTE2026-03-10
3 OK · 11 NOTE · 0 WARNING · 0 ERROR · 0 FAILURE

Documentation

READMENoVignettesYes · dynamicpkgdown siteNoNEWSYes · 0% structuredCode of conductNoContributing guideNo

Examples that run: 100%
Documented parameters: 96%
Return-value docs: 100%
References docs: 0%

Downloads

2.9K

CRAN downloads in the past year

Rank #8,475 · ~8/day · ~245/mo

Releases R versions

Daily download trend is not available in this view yet.

20630 days

1.2K90 days

2.9K1 year

Compare downloads with other packages →

Also on402 r2u

Repository

GitHub ↗ jokergoo/sfcurve

1Stars

0Forks

0Open issues

0Open PRs

0Releases

28Commits

1Contributors

28 commits · Last activity 2025-05-01

Stars over time

2024-09-05 · 12026-07-07 · 1

Repository practices

Upstream repositoryBeta

Checks run against github.com/jokergoo/sfcurve on 2026-07-31.

No development-tooling practices detected in the upstream repository.

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

Dependencies

Declared dependencies

10 external dependencies (excludes base and recommended)

Depends (1)

R >= 4.1.0

Imports (4)

gridRcppmethodscolorRamp2

LinkingTo (1)

Rcpp

Suggests (7)

rmarkdown knitr rgl testthat ComplexHeatmap igraph digest

Enhances (0)

none

Dependency license breakdown →

Reverse dependencies

0direct

0indirect

Nothing depends on this yet.

Code & Tests

People & History

People (1)

Maintainer (1)

Zuguang Gu

Author, Maintainer

Authors (1)

Zuguang Gu

Author, Maintainer

Package Timeline

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

R
R 4.6.0 released · 2026-04-24
1.0.1Latest
2026-04-10 · current release · diff ↗
1.0.0
2026-03-10
R
R 4.5.0 released · 2025-04-11

Package metadata

First published: 2024-09-13
Total releases: 2 / 2 yrs
License: MIT + file LICENSE OSI
Minimum R: ≥ 4.1.0
Download size: 69 KB
Installed size: not tracked yet
With dependencies: not tracked yet

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