lotri

1.0.4

A Simple Way to Specify Symmetric, Block Diagonal Matrices

8packages depend

37.1Kdownloads / year

97.6%test coverage

8/13checks pass

Overview

About

Maintained by Matthew L. FidlerFirst published 2019-05-1413 releasesCRAN page ↗GitHub ↗

Provides a simple mechanism to specify a symmetric block diagonal matrices (often used for covariance matrices). This is based on the domain specific language implemented in 'nlmixr2' but expanded to create matrices in R generally instead of specifying parts of matrices to estimate. It has expanded to include some matrix manipulation functions that are generally useful for 'rxode2' and 'nlmixr2'.

Install

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

install.packages("lotri", 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("nlmixr2/lotri")

Development version from nlmixr2/lotri. 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-lotri

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-lotri

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-lotri

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

Health

CRAN checks

5NOTE8OK

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

Slowest check: 2.5 min · r-oldrel-windows-x86_64

Code health

Yes

Tests · ratio 1.39

97.6%

Coverage · measured lines

100%

Documentation · exports

Dependencies · direct

Check history

NOTE2026-07-16
11 OK · 2 NOTE · 0 WARNING · 0 ERROR · 0 FAILURE
OK2026-03-10
14 OK · 0 NOTE · 0 WARNING · 0 ERROR · 0 FAILURE

Documentation

READMEYes · 1,342 wordsVignettesYes · dynamicpkgdown siteNoNEWSYes · 100% structuredCode of conductNoContributing guideNo

Examples that run: 100%
Documented parameters: 98%
Return-value docs: 92%
References docs: 8%

Downloads

37.1K

CRAN downloads in the past year

Rank #2,544 · ~102/day · ~3.1K/mo

Releases R versions

Daily download trend is not available in this view yet.

2.1K30 days

7.8K90 days

37.1K1 year

Compare downloads with other packages →

Also on972 r2u2 autocran19.6K conda_forge69 c2d4u

Repository

GitHub ↗ nlmixr2/lotri

7Stars

1Forks

2Open issues

2Open PRs

8Releases

403Commits

5Contributors

403 commits · Last activity 2026-06-15 · 0% stars, 30d

Stars over time

2024-12-14 · 62026-07-07 · 7

Repository practices

Upstream repositoryBeta

6 development-tooling and community-health practices detected across 5 families in the upstream repository

Checks run against github.com/nlmixr2/lotri on 2026-07-31.

Continuous integration (1)

GitHub Actions

CRAN release process (2)

cran-comments.mdCRAN-SUBMISSION

Docs source (1)

README.Rmd

Lint, format, editor (1)

lintr

Show all practices

Coverage (1)

Codecov

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

Development tooling

AI-assisted toolingBeta

Uses AI-assisted development tooling (declared in repo)

Earliest detected marker: claude on 2026-04-02

claudeantigravity

Most recent: antigravity on 2026-05-13

Evidence

claude: on or before 2026-04-02 · evidence B, D
antigravity: on 2026-05-13 · evidence D

How this is detected·Detection ruleset v2 (updated 2026-07-29)

Dependencies

Declared dependencies

10 external dependencies (excludes base and recommended)

Depends (1)

R >= 3.4.0

Imports (5)

checkmate crayonmethodsstatsutils

LinkingTo (2)

cpp4r armadillo4r

Suggests (7)

ggplot2 knitrMatrixmicrobenchmark rmarkdown testthat memuse

Enhances (0)

none

Dependency license breakdown →

Reverse dependencies

8direct

10indirect

babelmixr2 monolix2rx nlmixr2 nlmixr2est nlmixr2extra nonmem2rx rxode2 nlmixr2est rxode2 posologyr

Code & Tests

People & History

People (3)

Maintainer (1)

Matthew L. Fidler

Author, Maintainer

Authors (1)

Matthew L. Fidler

Author, Maintainer

Contributors (2)

Bill Denney

Contributor · added in 1.0.0

Mauricio Vargas Sepulveda

Contributor · added in 1.0.3

Package Timeline

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

1.0.4Latest
2026-05-14 · current release · diff ↗
R
R 4.6.0 released · 2026-04-24
1.0.3
2026-03-11 · diff ↗
1.0.2
2025-08-29 · diff ↗
1.0.1
2025-07-18 · diff ↗
R
R 4.5.0 released · 2025-04-11
1.0.0
2024-09-18 · diff ↗
R
R 4.4.0 released · 2024-04-24
R
R 4.3.0 released · 2023-04-21
0.4.3
2023-03-20 · diff ↗
0.4.2
2022-06-18 · diff ↗
R
R 4.2.0 released · 2022-04-22
0.4.1
2022-04-21 · diff ↗
0.4.0
2022-04-15 · diff ↗
R
R 4.1.0 released · 2021-05-18
0.3.1
2021-01-05 · diff ↗

Show 5 earlier events

0.2.2
2020-05-29 · diff ↗
R
R 4.0.0 released · 2020-04-24
0.2.1
2020-02-12 · diff ↗
0.1.1
2019-05-14
R
R 3.6.0 released · 2019-04-26

Package metadata

First published: 2019-05-14
Total releases: 13 / 7 yrs
License: GPL (>= 2) OSI
Minimum R: ≥ 3.4.0
Download size: 200 KB
Installed size: not tracked yet
With dependencies: not tracked yet

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