R Observatory: Metrics for LaMa version 2.1.2

Balamuta, James Joseph

doi:10.5281/zenodo.21843040

LaMa

2.1.2

Fast Numerical Maximum Likelihood Estimation for Latent Markov Models

0packages depend

4.2Kdownloads / year

–test coverage

13/13checks pass

Overview

About

Maintained by Jan-Ole FischerFirst published 2024-06-0411 releasesCRAN page ↗

A variety of latent Markov models, including hidden Markov models, hidden semi-Markov models, state-space models and continuous-time variants can be formulated and estimated within the same framework via directly maximising the likelihood function using the so-called forward algorithm. Applied researchers often need custom models that standard software does not easily support. Writing tailored 'R' code offers flexibility but suffers from slow estimation speeds. We address these issues by providing easy-to-use functions (written in 'C++' for speed) for common tasks like the forward algorithm. These functions can be combined into custom models in a Lego-type approach, offering up to 10-20 times faster estimation via standard numerical optimisers. To aid in building fully custom likelihood functions, several vignettes are included that show how to simulate data from and estimate all the above model classes.

Install

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

install.packages("LaMa", 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-lama

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-LaMa

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-LaMa

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

Health

CRAN checks

13OK

Slowest check: 12.4 min · r-oldrel-macos-x86_64

Code health

Yes

Tests · ratio 0.00

not tracked

Coverage

99%

Documentation · exports

11

Dependencies · direct

Check history

OK2026-08-05
13 OK · 0 NOTE · 0 WARNING · 0 ERROR · 0 FAILURE
NOTE2026-08-01
11 OK · 1 NOTE · 0 WARNING · 0 ERROR · 0 FAILURE
OK2026-07-25
5 OK · 0 NOTE · 0 WARNING · 0 ERROR · 0 FAILURE
ERROR2026-04-25
11 OK · 0 NOTE · 0 WARNING · 1 ERROR · 0 FAILURE
NOTE2026-04-22
11 OK · 3 NOTE · 0 WARNING · 0 ERROR · 0 FAILURE

Show 2 earlier snapshots

ERROR2026-04-18
10 OK · 3 NOTE · 0 WARNING · 1 ERROR · 0 FAILURE
NOTE2026-03-10
11 OK · 3 NOTE · 0 WARNING · 0 ERROR · 0 FAILURE

Documentation

READMEYes · 458 wordsVignettesYes · dynamicpkgdown siteNoNEWSYes · 67% structuredCode of conductNoContributing guideNo

Examples that run: 100%
Documented parameters: 98%
Return-value docs: 100%
References docs: 14%

Downloads

4.2K

CRAN downloads in the past year

Rank #5,999 · ~12/day · ~354/mo

Releases R versions

Daily download trend is not available in this view yet.

19130 days

1.4K90 days

4.2K1 year

Compare downloads with other packages →

Also on451 r2u14 autocran

Repository

GitHub ↗ janolefi/lama

19Stars

2Forks

0Open issues

0Open PRs

1Releases

966Commits

2Contributors

966 commits · Last activity 2026-08-03 · 0% stars, 30d

Stars over time

2026-02-11 · 162026-07-07 · 19

Repository practices

Upstream repositoryBeta

5 development-tooling and community-health practices detected across 4 families in the upstream repository

Checks run against github.com/janolefi/lama on 2026-08-09.

Continuous integration (1)

GitHub Actions

CRAN release process (2)

cran-comments.mdCRAN-SUBMISSION

Docs source (1)

README.Rmd

Lint, format, editor (1)

RStudio project

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

Dependencies

Declared dependencies

13 external dependencies (excludes base and recommended)

Depends (2)

R >= 3.5.0RTMB

Imports (10)

RcppstatsutilsmethodsMatrixsplines2mgcvMASSnumDeriv RTMBdist

LinkingTo (2)

Rcpp RcppArmadillo

Suggests (6)

knitr rmarkdown testthat PHSMM MSwM scales

Enhances (0)

none

Dependency license breakdown →

Reverse dependencies

0direct

0indirect

Nothing depends on this yet.

Code & Tests

Datasets

People & History

People (1)

Maintainer (1)

Jan-Ole Fischer

Author, Maintainer · added in 2.1.0

Authors (1)

Jan-Ole Fischer

Author, Maintainer · added in 2.1.0

Listed in earlier versions (1)

Jan-Ole Koslik

no longer listed · 1.0.0 to 2.0.6

Package Timeline

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

2.1.2Latest
2026-07-25 · current release · diff ↗
unarchivedReturned to CRAN
2026-07-24
archivedRemoved from CRAN
2026-07-15
issues were not corrected in time
2.1.1
2026-05-13 · diff ↗
R
R 4.6.0 released · 2026-04-24
2.1.0
2026-03-16 · diff ↗
2.0.6
2025-09-23 · diff ↗
2.0.5
2025-06-15 · diff ↗
2.0.4
2025-06-05 · diff ↗
R
R 4.5.0 released · 2025-04-11
2.0.3
2025-01-29 · diff ↗
2.0.2
2024-11-20 · diff ↗
2.0.1
2024-11-13 · diff ↗
2.0.0
2024-11-12 · diff ↗
1.0.0
2024-06-04
R
R 4.4.0 released · 2024-04-24

Package metadata

First published: 2024-06-04
Total releases: 11 / 2 yrs
License: MIT + file LICENSE OSI
Minimum R: ≥ 3.5.0
Bundled data: 229 KB / 2 files
Download size: 3.5 MB
Installed size: not tracked yet
With dependencies: not tracked yet

Cite

Cite this package

Run in R for the authors' preferred citation:

citation("LaMa")

Format

Fischer, J. (2026). LaMa: Fast Numerical Maximum Likelihood Estimation for Latent Markov Models (Version 2.1.2) [Computer software]. https://doi.org/10.32614/CRAN.package.LaMa

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 LaMa version 2.1.2 [Data set]. HJJB, LLC. Data release v2026-08-13. https://doi.org/10.5281/zenodo.21843040

From data release v2026-08-13, which the citation names so these numbers can be found later. More on citing and the projects behind them.

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