R conversion
Dear Mark,
-----Original Message----- From: Mark Strivens [mailto:mstrivens at houston.rr.com] Sent: Thursday, September 09, 2004 9:52 PM To: John Fox Cc: r-help at stat.math.ethz.ch Subject: Re: [R] R conversion Thanks John for the post - I had found factanal However factanal it seems you have specify the number of factors to be fitted up front, whereas with the SAS procedure you don't - this is apparently important to the analysis!
With ML factor analysis, you can test how many factors are required.
Perhaps I could emulate this function by breaking it down using factor extraction by principal component analysis and the doing the varimax rotation second? If that makes any sense?
Yes -- it shouldn't be hard to write your own PA factor-analysis function,
if that's what you prefer. For principal-components analysis, see ?princomp
and ?prcomp [which are turned up by help.search("principal components"), by
the way].
Regards,
John