R Observatory: Metrics for lstar version 0.2.2

Balamuta, James Joseph

doi:10.5281/zenodo.21843040

lstar

0.2.2

Uniform Data Model and 'Zarr' Interchange for Single-Cell Omics

0packages depend

741downloads / year

40.4%test coverage

13/13checks pass

Overview

About

Maintained by Peter KharchenkoFirst published 2026-06-223 releasesCRAN page ↗GitHub ↗

A lightweight interchange layer for single-cell and spatial omics data, built on the L-star model of labelled axes and typed fields over them, serialized to the 'Zarr' format. Provides bidirectional converters ("profiles") for 'Seurat', 'SingleCellExperiment', 'Conos', and 'pagoda2' objects, including collections of heterogeneous samples, via a shared C++ core ('libstar') so the same store is readable from R, 'Python', and C++.

Install

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

install.packages("lstar", 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("kharchenkolab/lstar")

Development version from kharchenkolab/lstar. 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-lstar

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-lstar

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-lstar

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

Health

CRAN checks

13OK

Slowest check: 5.8 min · r-devel-windows-x86_64

Code health

Yes

Tests · ratio 0.18

40.4%

Coverage · measured lines

100%

Documentation · exports

4

Dependencies · direct

Check history

OK2026-08-05
13 OK · 0 NOTE · 0 WARNING · 0 ERROR · 0 FAILURE
NOTE2026-08-01
12 OK · 1 NOTE · 0 WARNING · 0 ERROR · 0 FAILURE
OK2026-06-23
6 OK · 0 NOTE · 0 WARNING · 0 ERROR · 0 FAILURE

Documentation

READMENoVignettesYes · dynamicpkgdown siteNoNEWSYes · 100% structuredCode of conductNoContributing guideNo

Examples that run: 100%
Documented parameters: 94%
Return-value docs: 100%
References docs: 0%

Downloads

741

CRAN downloads in the past year

Rank #13,785 · ~2/day · ~62/mo

Releases R versions

Daily download trend is not available in this view yet.

35130 days

74190 days

7411 year

Compare downloads with other packages →

Also on39 r2u

Repository

GitHub ↗ kharchenkolab/lstar

3Stars

0Forks

0Open issues

0Open PRs

11Releases

320Commits

1Contributors

License MIT · 320 commits · Last activity 2026-07-30 · +50% stars, 30d

Stars over time

2026-06-19 · 12026-08-02 · 3

Repository practices

Upstream repositoryBeta

2 development-tooling and community-health practices detected across 2 families in the upstream repository

Checks run against github.com/kharchenkolab/lstar on 2026-08-16.

Continuous integration (1)

GitHub Actions

Governance and community (1)

Support guide

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

Dependencies

Declared dependencies

14 external dependencies (excludes base and recommended)

Depends (0)

none

Imports (4)

Matrixmethodsstatsutils

LinkingTo (1)

cpp11

Suggests (13)

SeuratObject Seurat SingleCellExperiment SummarizedExperiment S4Vectors GenomicRanges igraph conos pagoda2 HDF5Array testthat knitr rmarkdown

Enhances (0)

none

Dependency license breakdown →

Reverse dependencies

0direct

0indirect

Nothing depends on this yet.

Code & Tests

People & History

People (1)

Maintainer (1)

Peter Kharchenko

Author, Maintainer

Authors (1)

Peter Kharchenko

Author, Maintainer

Package Timeline

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

0.2.2Latest
2026-08-04 · current release · diff ↗
0.2.1
2026-07-22 · diff ↗
0.1.0
2026-06-22
R
R 4.6.0 released · 2026-04-24

Package metadata

First published: 2026-06-22
Total releases: 3 / 1 yrs
License: MIT + file LICENSE OSI
Download size: 295 KB
Installed size: not tracked yet
With dependencies: not tracked yet

Cite

Cite this package

Run in R for the authors' preferred citation:

citation("lstar")

Format

Kharchenko, P. (2026). lstar: Uniform Data Model and 'Zarr' Interchange for Single-Cell Omics (Version 0.2.2) [Computer software]. https://doi.org/10.32614/CRAN.package.lstar

This is what citation() produces when a package has no citation file of its own. If it prints something else, use that.

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 lstar version 0.2.2 [Data set]. HJJB, LLC. Data release v2026-08-16. https://doi.org/10.5281/zenodo.21843040

From data release v2026-08-16, which the citation names so these numbers can be found later. More on citing and the projects behind them.

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