[R] princomp and factanal()

[Ramon Diaz-Uriarte]

On Tuesday 28 November 2006 16:03, Tom Backer Johnsen wrote:
> I have been looking at the documentation and the output from the
> functions princomp() and factanal(), and found them somewhat difficult
> to understand.  This is probably due to differences in respect to what
> I am used to with respect to terminology (my field is psychology).
> Are there some additional texts which might help?

Dear Tom,

I suggest you look at MASS (Modern Applied Statistics With S), by Venables & 
Ripley. These issues are explained there (someone borrowed my copy, so I 
can't tell you the chapter, pages, etc). You might also want to take a look 
in a multivariate stats. book (e.g., Krzanowski explains these issues very 
well) for general differences between PCA and factor analysis.



HTH,

R.


>
> Sincerely,
>
> Tom
>
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-- 
Ramón Díaz-Uriarte
Bioinformatics 
Centro Nacional de Investigaciones Oncológicas (CNIO)
(Spanish National Cancer Center)
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