Path: blob/main/math/R-cran-GPArotation/pkg-descr
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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.