Promax {psych} | R Documentation |
promax is an oblique rotation function introduced by Hendrickson and White (1964) and implemented in the promax function in the stats package. Unfortunately, promax does not report the inter factor correlations. Promax does.
Promax(x, m = 4)
x |
A loadings matrix |
m |
the power to which to raise the varimax loadings |
This is a very direct adaptation of the stats::promax function. The addition is that it will return the interfactor correlations as well as the loadings and rotation matrix.
In addition, it will take output from either the factanal, factor.pa, or principal functions and select just the loadings matrix for analysis.
loadings |
Oblique factor loadings |
rotmat |
The rotation matrix applied to the original loadings to produce the promax soluion |
Phi |
The interfactor correlation matrix |
A direct adaptation of the stats:promax function following suggestions to the R-help list by Ulrich Keller and John Fox.
William Revelle
Hendrickson, A. E. and White, P. O, 1964, British Journal of Statistical Psychology, 17, 65-70.
jen <- sim.hierarchical() f3 <- factor.pa(jen,3) Promax(f3) m3 <- factanal(covmat=jen,factors=3) Promax(m3)