cgam

1.32

Constrained Generalized Additive Model

4packages depend

32.5Kdownloads / year

–test coverage

13/13checks pass

Overview

About

Maintained by Xiyue LiaoFirst published 2014-03-0533 releasesCRAN page ↗

A constrained generalized additive model is fitted by the cgam routine. Given a set of predictors, each of which may have a shape or order restrictions, the maximum likelihood estimator for the constrained generalized additive model is found using an iteratively re-weighted cone projection algorithm. The ShapeSelect routine chooses a subset of predictor variables and describes the component relationships with the response. For each predictor, the user needs only specify a set of possible shape or order restrictions. A model selection method chooses the shapes and orderings of the relationships as well as the variables. The cone information criterion (CIC) is used to select the best combination of variables and shapes. A genetic algorithm may be used when the set of possible models is large. In addition, the cgam routine implements a two-dimensional isotonic regression using warped-plane splines without additivity assumptions. It can also fit a convex or concave regression surface with triangle splines without additivity assumptions. See Liao X, Meyer MC (2019)doi:10.18637/jss.v089.i05 for more details.

Install

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

install.packages("cgam", 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-cgam

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-cgam

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-cgam

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

Health

CRAN checks

13OK

Slowest check: 7.9 min · r-devel-linux-x86_64-fedora-clang

Code health

None

Tests · ratio 0.00

not tracked

Coverage

100%

Documentation · exports

Dependencies · direct

Check history

OK2026-03-10
14 OK · 0 NOTE · 0 WARNING · 0 ERROR · 0 FAILURE

Documentation

READMENoVignettesNopkgdown siteNoNEWSNoCode of conductNoContributing guideNo

Examples that run: 86%
Documented parameters: 92%
Return-value docs: 100%
References docs: 82%

Downloads

32.5K

CRAN downloads in the past year

Rank #2,304 · ~89/day · ~2.7K/mo

Releases R versions

Daily download trend is not available in this view yet.

2.8K30 days

10K90 days

32.5K1 year

Compare downloads with other packages →

Also on391 r2u17 autocran

Dependencies

Declared dependencies

13 external dependencies (excludes base and recommended)

Depends (2)

R >= 4.3.0coneproj

Imports (13)

splines2 svDialogs statmod lme4Matrixggplot2 dplyrparallelzeallot rlang quadprogMASSstats

LinkingTo (0)

none

Suggests (6)

graphicsgrDevicesutilsroxygen2 patchwork glmnet

Enhances (0)

none

Dependency license breakdown →

Reverse dependencies

4direct

1indirect

csurvey cgaim insight parameters

Code & Tests

Datasets

People & History

People (2)

Maintainer (1)

Xiyue Liao

Author, Maintainer

Authors (2)

Xiyue Liao

Author, Maintainer

Mary Meyer

Author · added in 1.18

Listed in earlier versions (1)

Mary C. Meyer

no longer listed · 1.0 to 1.17

Package Timeline

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

R
R 4.6.0 released · 2026-04-24
1.32Latest
2026-03-05 · current release · diff ↗
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R 4.5.0 released · 2025-04-11
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R 4.4.0 released · 2024-04-24
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2023-08-10 · diff ↗
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R 4.3.0 released · 2023-04-21

Show 31 earlier events

1.20
2022-11-16 · diff ↗
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1.18
2022-07-18 · diff ↗
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R 4.2.0 released · 2022-04-22
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2021-12-13 · diff ↗
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R 4.1.0 released · 2021-05-18
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R 4.0.0 released · 2020-04-24
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2019-10-13 · diff ↗
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2019-05-01 · diff ↗
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R 3.6.0 released · 2019-04-26
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R 3.5.0 released · 2018-04-23
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R 3.4.0 released · 2017-04-21
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R 3.3.0 released · 2016-05-03
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2015-10-01 · diff ↗
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R 3.2.0 released · 2015-04-16
1.2
2014-09-10 · diff ↗
1.1
2014-04-17 · diff ↗
R
R 3.1.0 released · 2014-04-10
1.0
2014-03-05
R
R 3.0.0 released · 2013-04-03

Package metadata

First published: 2014-03-05
Total releases: 33 / 12 yrs
License: GPL (>= 2) OSI
Minimum R: ≥ 4.3.0
Bundled data: 116 KB / 4 files
Download size: 352 KB
Installed size: not tracked yet
With dependencies: not tracked yet

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