[R] How to do varimax rotation for principal component based factor analysis, any packages?

Prof Brian Ripley ripley at stats.ox.ac.uk
Sun Apr 16 13:57:53 CEST 2006

On Sun, 16 Apr 2006, ronggui wrote:

> I don't think the result from _princomp _ should be rotated.
> The definition of "principal components" explicitly indicates that the
> result is to have axes that are uncorrelated and line up in directions
> of maximum variance.
> If I am wrong,I hope some one else to point it out.

They can be, whether they should be is another matter.  See the 
Statistical Complements to MASS3 at 
http://www.stats.ox.ac.uk/pub/MASS3/Compl.shtml for some examples and 

The original post is starting from false premises: there is no `factanal 
package', and the varimax function in stats is not confined to the results 
of factanal().

If for some reason you want to use the so-called `principal component 
factor analysis', you could make use of one of the several statistical 
systems with names starting with S that provide it, or write your own R 

> 2006/4/16, Yong Wang <wangyong1 at gmail.com>:
>> Dear R users
>> the factanal pacakge is always MLE, which package can do varimax
>> rotation with the results from princomp ?
>> thank you
>> yong
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> Deparment of Sociology
> Fudan University

Brian D. Ripley,                  ripley at stats.ox.ac.uk
Professor of Applied Statistics,  http://www.stats.ox.ac.uk/~ripley/
University of Oxford,             Tel:  +44 1865 272861 (self)
1 South Parks Road,                     +44 1865 272866 (PA)
Oxford OX1 3TG, UK                Fax:  +44 1865 272595

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