Factor loading matrices derived from Thurstone's box data.
data(Thurstone)Two numeric matrices:
box26: 26 x 3 matrix of unrotated factor loadings.
box20: 20 x 3 matrix of unrotated factor loadings.
Loading the data makes the following objects available:
box26 is a \(26 \times 3\) unrotated factor loading
matrix for 26 variables measured on a set of boxes. It appears
frequently in the rotation literature as a dataset for
comparing rotation criteria, particularly for assessing local minima.
box20 is a \(20 \times 3\) unrotated factor loading
matrix for a subset of 20 variables from the same box data. It is
used in Jennrich (2002) to illustrate rotation criteria and local
minima behavior.
Both matrices are suitable as input to GPForth, GPFoblq,
and all rotation wrapper functions in GPArotation. For a richer
collection of factor analysis datasets, see the psych package.
Jennrich, R.I. (2002). A simple general method for oblique rotation. Psychometrika, 67(1), 7--19. tools:::Rd_expr_doi("10.1007/BF02294706")
GPForth,
rotations,
Harman,
CCAI,
WansbeekMeijer,
GriffithMulaik