R-cran-GPArotation

Gradient Projection Algorithms for Factor Rotation

GPA Rotation for Factor Analysis The GPArotation package contains functions for the rotation of factor loadings matrices. The functions implement Gradient Projection (GP) algorithms for orthogonal and oblique rotation. Additionally, a number of rotation criteria are provided. The GP algorithms minimize the rotation criterion function, and provide the corresponding rotation matrix. For oblique rotation, the covariance/correlation matrix of the factors is also provided.