Re: [R] Factor Analysis/Inputting Correlation Matrix

[biorafas]

ey man!!

you need to change the format of your data as matrix


data - as.matrix(correlation_data) 

solucion - factanal(covmat = data, factors=2)

that´s all!!!

enjoy

Rafael Ch.

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Re: [R] Factor Analysis/Inputting Correlation Matrix

[Joshua Wiley]

Hi Matt,

Did you try reading the documentation for factanal()?  You can pull it
up by typing: help(factanal)

These give basically identical results using the raw data, the
covariance matrix, and the correlation matrix.

factanal(x = mtcars, factors = 3)
factanal(factors = 3, covmat = cov(mtcars))
factanal(factors = 3, covmat = cor(mtcars))

all of which is clearly, explained if you read the details for the
argument covmat in the help.

Cheers,

Josh

On Sat, Jun 11, 2011 at 3:06 PM, Matt Stati mattst...@yahoo.com wrote:
 Can someone please direct me to how to run a factor analysis in R by first 
 inputting a correlation matrix? Does the function factanal allow one to 
 read a correlation matrix instead of data vectors?

 Thanks,
 Matt.

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Joshua Wiley
Ph.D. Student, Health Psychology
University of California, Los Angeles
http://www.joshuawiley.com/

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