[R] Factor analysis (correction)

John Fox jfox at mcmaster.ca
Sat Jun 8 05:39:37 CEST 2002

Dear Marcos:

At 06:06 PM 6/7/2002 -0300, Marcos Sanches wrote:

>>         Besides, how can I have the communalities with 'factanal' 
>> function? I
>>didn't find it on html help.
>>         Sorry, I am a new R user...

and I wrote:

>The communalities are the complements of the uniquenesses (i.e., 1 - 
>uniqueness). Alternatively, for orthogonally rotated factors, the 
>communalities are the row sums of the matrix of factor loadings.

Actually, the communalities are the row sums of the *squared* loadings.

Sorry for the slip,

John Fox
Department of Sociology
McMaster University
Hamilton, Ontario, Canada L8S 4M4
email: jfox at mcmaster.ca
phone: 905-525-9140x23604
web: www.socsci.mcmaster.ca/jfox

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