# Gradient Projection Factor Rotation

## Documentation for package ‘GPArotation’ version 2026.8-2

- DESCRIPTION file.
- User guides, package vignettes and other documentation.
- Package NEWS.

## Help Pages

GPArotation-package | Gradient Projection Algorithms for Factor Rotation
.GPA_RS_engine | Core Algorithms and Random-Start Wrappers
.sortGPALoadings | Print and Summary Methods for GPArotation Class Objects
bentlerQ | Rotations Functions Using Gradient Projection Algorithms
bentlerT | Rotations Functions Using Gradient Projection Algorithms
bifactorQ | Rotations Functions Using Gradient Projection Algorithms
bifactorT | Rotations Functions Using Gradient Projection Algorithms
bigeominQ | Rotations Functions Using Gradient Projection Algorithms
bigeominT | Rotations Functions Using Gradient Projection Algorithms
binormamin | Rotations Functions Using Gradient Projection Algorithms
box20 | Thurstone Box Data
box26 | Thurstone Box Data
CCAI | The CCAI Climate-Friendly Purchasing Choices Domain
CCAI_pattern | The CCAI Climate-Friendly Purchasing Choices Domain
CCAI_Phi | The CCAI Climate-Friendly Purchasing Choices Domain
CCAI_R | The CCAI Climate-Friendly Purchasing Choices Domain
cfQ | Rotations Functions Using Gradient Projection Algorithms
cfT | Rotations Functions Using Gradient Projection Algorithms
echelon | Echelon Rotation
eiv | Errors-in-Variables Rotation
entropy | Rotations Functions Using Gradient Projection Algorithms
equamax | Rotations Functions Using Gradient Projection Algorithms
geominQ | Rotations Functions Using Gradient Projection Algorithms
geominT | Rotations Functions Using Gradient Projection Algorithms
GPArotation | Gradient Projection Algorithms for Factor Rotation
GPArotation.Intro | Gradient Projection Algorithms for Factor Rotation
GPFoblq | Core Algorithms and Random-Start Wrappers
GPFoblq.legacy | Core Algorithms and Random-Start Wrappers
GPFoblq.lp | Lp Rotation
GPForth | Core Algorithms and Random-Start Wrappers
GPForth.legacy | Core Algorithms and Random-Start Wrappers
GPForth.lp | Lp Rotation
GPFRSoblq | Core Algorithms and Random-Start Wrappers
GPFRSorth | Core Algorithms and Random-Start Wrappers
GriffithMulaik | Griffith and Mulaik Interpersonal Personality Traits
Harman | Harman's Eight Physical Variables
Harman8 | Harman's Eight Physical Variables
infomaxQ | Rotations Functions Using Gradient Projection Algorithms
infomaxT | Rotations Functions Using Gradient Projection Algorithms
Lp rotation | Lp Rotation
lpQ | Rotations Functions Using Gradient Projection Algorithms
lpT | Rotations Functions Using Gradient Projection Algorithms
mccammon | Rotations Functions Using Gradient Projection Algorithms
NetherlandsTV | Netherlands Television Viewership Data
oblimax | Rotations Functions Using Gradient Projection Algorithms
oblimin | Rotations Functions Using Gradient Projection Algorithms
parsimax | Rotations Functions Using Gradient Projection Algorithms
plot.GPArotation | Plot Method for GPArotation Objects
plot2fOrthComparison | Algorithm Comparison for Two-Factor Orthogonal Rotation
print.GPArotation | Print and Summary Methods for GPArotation Class Objects
print.summary.GPArotation | Print and Summary Methods for GPArotation Class Objects
pstQ | Rotations Functions Using Gradient Projection Algorithms
pstT | Rotations Functions Using Gradient Projection Algorithms
quartimax | Rotations Functions Using Gradient Projection Algorithms
quartimin | Rotations Functions Using Gradient Projection Algorithms
Random.Start | Random Starting Matrix for Factor Rotation
rotations | Rotations Functions Using Gradient Projection Algorithms
simplimax | Rotations Functions Using Gradient Projection Algorithms
summary.GPArotation | Print and Summary Methods for GPArotation Class Objects
tandemI | Rotations Functions Using Gradient Projection Algorithms
tandemII | Rotations Functions Using Gradient Projection Algorithms
targetQ | Rotations Functions Using Gradient Projection Algorithms
targetT | Rotations Functions Using Gradient Projection Algorithms
Thurstone | Thurstone Box Data
Varimax | Rotations Functions Using Gradient Projection Algorithms
varimin | Rotations Functions Using Gradient Projection Algorithms
vgQ | Rotation Criteria: Value and Gradient Functions
vgQ.bentler | Rotation Criteria: Value and Gradient Functions
vgQ.bifactor | Rotation Criteria: Value and Gradient Functions
vgQ.bigeomin | Rotation Criteria: Value and Gradient Functions
vgQ.cf | Rotation Criteria: Value and Gradient Functions
vgQ.entropy | Rotation Criteria: Value and Gradient Functions
vgQ.geomin | Rotation Criteria: Value and Gradient Functions
vgQ.infomax | Rotation Criteria: Value and Gradient Functions
vgQ.lp.wls | Rotation Criteria: Value and Gradient Functions
vgQ.mccammon | Rotation Criteria: Value and Gradient Functions
vgQ.oblimax | Rotation Criteria: Value and Gradient Functions
vgQ.oblimin | Rotation Criteria: Value and Gradient Functions
vgQ.pst | Rotation Criteria: Value and Gradient Functions
vgQ.quartimax | Rotation Criteria: Value and Gradient Functions
vgQ.quartimin | Rotation Criteria: Value and Gradient Functions
vgQ.simplimax | Rotation Criteria: Value and Gradient Functions
vgQ.tandemI | Rotation Criteria: Value and Gradient Functions
vgQ.tandemII | Rotation Criteria: Value and Gradient Functions
vgQ.target | Rotation Criteria: Value and Gradient Functions
vgQ.varimax | Rotation Criteria: Value and Gradient Functions
vgQ.varimin | Rotation Criteria: Value and Gradient Functions
WansbeekMeijer | Netherlands Television Viewership Data