[R] Factanal fits

[Prof Brian Ripley]

On 28/05/2012 02:20, Hunsicker, Lawrence wrote:
> Greetings, all:
>
> I am using factanal in R.
>
> When I enter a matrix or a formula, the print method winds up with something like this:
>
> Test of the hypothesis that 6 factors are sufficient.
> The chi square statistic is 28.1 on 22 degrees of freedom.
> The p-value is 0.172
>
> But when I enter a covmat, the print method winds up with something like this:
>
> The degrees of freedom for the model is 22 and the fit was 0.0904
>
> The actual factanal print method is suppressed, so I can't figure out how the two calculations are done, or how they relate to one another.  Can any of you help?

No, it is not.  You can find it by getS3method, for example.

> Many thanks in advance for any insight any of you can give me.

To do the tests you need the number of observations.  I expect you used 
'covmat' incorrectly, but you were too unhelpful to actually show us 
what you did.
>
> Larry Hunsicker
> Professor, Internal Medicine, U. Iowa College of Medicine
>
>
>
>
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And that means YOU.  No HTML (as we asked), and include reproducible 
code for what you did and claim does not work as you want.

-- 
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)
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