GPArotation: Gradient Projection Factor Rotation

Gradient projection algorithms for orthogonal and oblique rotation of factor loadings matrices in factor analysis. Implements a comprehensive set of rotation criteria including quartimax, quartimin, oblimin, geomin, simplimax, the Crawford-Ferguson family, and target rotation, among others. Supports multiple random starts. For details see Bernaards and Jennrich (2005) <doi:10.1177/0013164404272507>.

Version:	2026.6-1
Depends:	R (≥ 3.5.0)
Imports:	stats, grDevices, graphics, utils
Published:	2026-06-18
DOI:	10.32614/CRAN.package.GPArotation
Author:	Coen Bernaards [aut, cre], Paul Gilbert [aut], Robert Jennrich [aut]
Maintainer:	Coen Bernaards <cab.gparotation at gmail.com>
License:	GPL-2 | GPL-3 [expanded from: GPL (≥ 2)]
URL:	https://cran.r-project.org/package=GPArotation
NeedsCompilation:	no
Citation:	GPArotation citation info
Materials:	NEWS
In views:	Psychometrics
CRAN checks:	GPArotation results

Documentation:

Reference manual:	GPArotation.html , GPArotation.pdf
Vignettes:	Gradient Projection Factor Rotation (source, R code) Assessing Local Minima in Factor Rotation (source, R code) Bifactor Rotation and Reliability Coefficients (source, R code) Factor Model Fit and Simple Structure Diagnostics (source, R code)

Downloads:

Package source:	GPArotation_2026.6-1.tar.gz
Windows binaries:	r-devel: GPArotation_2026.6-1.zip, r-release: GPArotation_2026.4-1.zip, r-oldrel: GPArotation_2026.6-1.zip
macOS binaries:	r-release (arm64): GPArotation_2026.6-1.tgz, r-oldrel (arm64): GPArotation_2026.6-1.tgz, r-release (x86_64): GPArotation_2026.6-1.tgz, r-oldrel (x86_64): GPArotation_2026.6-1.tgz
Old sources:	GPArotation archive

Reverse dependencies:

Reverse depends:	brxx, esem, PCovR, REMLA
Reverse imports:	cdmTools, Compind, EFA.dimensions, EFAtools, EFAutilities, EGAnet, EMMAgeo, epca, fungible, GPArotateDF, jmv, kfa, lsirm12pl, mirt, MixLFA, MultBiplotR, netCoin, psych, radiant.multivariate, RSP, semanticfa, ufs, whomds
Reverse suggests:	bayesqm, BayesRTMB, bruceR, ecostats, fad, FinTS, JWileymisc, multivarious, parameters, performance, psycho, psychTools, REdaS, SignalY, sjPlot, TAM, umx

Linking:

Please use the canonical form https://CRAN.R-project.org/package=GPArotation to link to this page.