Package: lotri 1.0.5

Matthew L. Fidler

lotri: A Simple Way to Specify Symmetric, Block Diagonal Matrices

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'.

Authors:Matthew L. Fidler [aut, cre], Mauricio Vargas Sepulveda [ctb], Bill Denney [ctb]

lotri_1.0.5.tar.gz
lotri_1.0.5.zip(r-4.7-x86_64)lotri_1.0.5.zip(r-4.7-arm64)lotri_1.0.5.zip(r-4.6-x86_64)lotri_1.0.5.zip(r-4.6-arm64)lotri_1.0.5.zip(r-4.5-x86_64)
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lotri_1.0.5.tgz(r-4.6-emscripten)
manual.pdf |manual.html✨
DESCRIPTION |NEWS
card.svg |card.png
lotri/json (API)

# Install 'lotri' in R:
install.packages('lotri', repos = c('https://nlmixr2.r-universe.dev', 'https://cloud.r-project.org'))

Bug tracker:https://github.com/nlmixr2/lotri/issues

Pkgdown/docs site:https://nlmixr2.github.io

Uses libs:
  • openblas– Optimized BLAS
  • c++– GNU Standard C++ Library v3
  • openmp– GCC OpenMP (GOMP) support library

On CRAN:

Conda:

openblascppopenmp

9.48 score 7 stars 20 packages 41 scripts 3.2k downloads 17 exports 5 dependencies

Last updated from:7151a54c00. Checks:15 OK. Indexed: yes.

TargetResultTimeFilesSyslog
linux-devel-arm64OK108
linux-devel-x86_64OK125
source / vignettesOK184
linux-release-arm64OK109
linux-release-x86_64OK131
macos-release-arm64OK103
macos-release-x86_64OK265
macos-oldrel-arm64OK98
macos-oldrel-x86_64OK252
windows-devel-arm64OK212
windows-devel-x86_64OK156
windows-release-arm64OK235
windows-release-x86_64OK103
windows-oldrel-x86_64OK117
wasm-releaseOK97

Exports:.lotriPointersas.lotrilotrilotriAsExpressionlotriBaseConditionlotriDataFrameToLotriExpressionlotriEstlotriIsBlockMatlotriIsSamelotriMatlotriMatInvlotriNearPDlotriPriorDistslotriSameBreaklotriSameMaplotriSeprcm

Dependencies:armadillo4rbackportscheckmatecpp4rcrayon

Repeated blocks with same() in lotri
What same() is for | The rules | How it is stored: the condition column | Reading the column | Round trips | same() versus cnd(same = n)
Rendered fromlotri-same.Rmdusingknitr::rmarkdown

Last update: 2026-09-03
Started: 2026-09-03

Prior distributions in lotri
Why priors are in lotri | The syntax | What a prior can be attached to | Population parameters | A single between subject variability term | A whole covariance block | Degrees of freedom for an omega block | A prior on the omega values themselves | One joint block over thetas and omega elements | One block at a time | The normal prior shorthand | More than one parameter | Transformations | Zero variance | Distribution names | Why dt() is not studentT() | The supported distributions | Bounds and truncated priors | What else is checked | Getting the priors back out | Using this downstream | A prior must never be silently ignored
Rendered fromlotri-priors.Rmdusingknitr::rmarkdown

Last update: 2026-08-14
Started: 2026-08-13

Lotri Motivation
Motivation | Creating lists of matrices with attached properties | Combining symmetric named matrices
Rendered fromlotri-motivation.Rmdusingknitr::rmarkdown

Last update: 2022-06-18
Started: 2019-05-10