LAM

0.7-22

Some Latent Variable Models

1packages depend

4.1Kdownloads / year

–test coverage

11/13checks pass

Overview

About

Maintained by Alexander RobitzschFirst published 2017-05-118 releasesCRAN page ↗GitHub ↗

Includes some procedures for latent variable modeling with a particular focus on multilevel data. The 'LAM' package contains mean and covariance structure modelling for multivariate normally distributed data (mlnormal(); Longford, 1987; doi:10.1093/biomet/74.4.817), a general Metropolis-Hastings algorithm (amh(); Roberts & Rosenthal, 2001, doi:10.1214/ss/1015346320) and penalized maximum likelihood estimation (pmle(); Cole, Chu & Greenland, 2014; doi:10.1093/aje/kwt245).

Install

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

install.packages("LAM", 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("alexanderrobitzsch/LAM")

Development version from alexanderrobitzsch/LAM. 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-lam

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-LAM

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-LAM

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

Health

CRAN checks

2NOTE11OK

Failing flavors

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

Slowest check: 2.8 min · r-oldrel-windows-x86_64

Code health

None

Tests · ratio 0.00

not tracked

Coverage

100%

Documentation · exports

Dependencies · direct

Check history

NOTE2026-05-11
11 OK · 2 NOTE · 0 WARNING · 0 ERROR · 0 FAILURE
WARNING2026-05-10
11 OK · 1 NOTE · 1 WARNING · 0 ERROR · 0 FAILURE
NOTE2026-04-22
12 OK · 2 NOTE · 0 WARNING · 0 ERROR · 0 FAILURE
ERROR2026-04-18
11 OK · 2 NOTE · 0 WARNING · 1 ERROR · 0 FAILURE
NOTE2026-03-30
12 OK · 2 NOTE · 0 WARNING · 0 ERROR · 0 FAILURE

Show 2 earlier snapshots

ERROR2026-03-28
11 OK · 2 NOTE · 0 WARNING · 1 ERROR · 0 FAILURE
NOTE2026-03-10
12 OK · 2 NOTE · 0 WARNING · 0 ERROR · 0 FAILURE

Documentation

READMEYes · 135 wordsVignettesNopkgdown siteNoNEWSNoCode of conductNoContributing guideNo

Examples that run: 57%
Documented parameters: 98%
Return-value docs: 100%
References docs: 100%

Downloads

4.1K

CRAN downloads in the past year

Rank #10,287 · ~11/day · ~346/mo

Releases R versions

Daily download trend is not available in this view yet.

31930 days

1.1K90 days

4.1K1 year

Compare downloads with other packages →

Also on398 r2u21 autocran42 c2d4u

Repository

GitHub ↗ alexanderrobitzsch/lam

7Stars

3Forks

0Open issues

0Open PRs

13Releases

31Commits

2Contributors

structural-equation-modelingmultilevel-models

31 commits · Last activity 2024-07-15 · 0% stars, 30d

Stars over time

2025-02-26 · 62026-07-07 · 7

Repository practices

Upstream repositoryBeta

1 development-tooling and community-health practice detected across 1 family in the upstream repository

Checks run against github.com/alexanderrobitzsch/lam on 2026-07-19.

Git structural (1)

.gitattributes

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

Dependencies

Declared dependencies

9 external dependencies (excludes base and recommended)

Depends (1)

R >= 3.1

Imports (6)

CDMgraphicsRcpp sirtstatsutils

LinkingTo (2)

Rcpp RcppArmadillo

Suggests (5)

coda expmMASSnumDeriv TAM

Enhances (0)

none

Dependency license breakdown →

Reverse dependencies

1direct

0indirect

STARTS

Code & Tests

Code Composition

R 3,457 (58%)Rd 1,959 (33%)C++ 572 (10%)

Code characteristics

Object systems

S316

Cyclomatic complexity: 1.0 median / 21 max

Test coverage

Line coverage

–

Expression

–

Tests / Examples

–

Functions

129 7 exported

Complexity

2.7 avg / 21 max

Call network

129 nodes / 113 edges

Call graph

Open call graph →

Loading call graph…

Lowest coverage

Per-function coverage is not measured for this package yet.

Datasets

Bundled datasets · 1

Name	Class	Rows × Cols	Also ships in
data.HT12	data.frame	120 × 11	–

People & History

People (0)

Author records are not tracked yet for this package.

Listed in earlier versions (1)

Alexander Robitzsch

no longer listed · 0.0-17 to 0.7-22

Package Timeline

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

R
R 4.6.0 released · 2026-04-24
R
R 4.5.0 released · 2025-04-11
0.7-22Latest
2024-07-15 · current release · diff ↗
R
R 4.4.0 released · 2024-04-24
R
R 4.3.0 released · 2023-04-21
0.6-19
2022-05-18 · diff ↗
unarchivedReturned to CRAN
2022-05-18
archivedRemoved from CRAN
2022-05-12
requires archived package 'CDM'
R
R 4.2.0 released · 2022-04-22
R
R 4.1.0 released · 2021-05-18
0.5-15
2020-05-09 · diff ↗
R
R 4.0.0 released · 2020-04-24
0.4-17
2019-05-06 · diff ↗
R
R 3.6.0 released · 2019-04-26
0.3-48
2018-06-07 · diff ↗
R
R 3.5.0 released · 2018-04-23

Show 4 earlier events

0.2-9
2018-03-20 · diff ↗
0.1-22
2017-11-24 · diff ↗
0.0-17
2017-05-11
R
R 3.4.0 released · 2017-04-21

Package metadata

First published: 2017-05-11
Total releases: 8 / 9 yrs
License: GPL (>= 2) OSI
Minimum R: ≥ 3.1
Bundled data: 1.6 KB / 2 files
Download size: 67 KB
Installed size: not tracked yet
With dependencies: not tracked yet

Appears in task views

Psychometric Models and Methods

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