[R] Help with factanal and missing values

[Antonio Prioglio]

On Tue, 13 Jul 2004, John Fox wrote:

> Dear Antonio,
> 
> This example is (as stated) a second-order CFI, where each of the primary
> factors, F1, F2, and F3 depends upon the second-order factor F4. To have no
> second-order structure, simply define variances and (assuming that you're
> specifying correlated factors) covariances among the factors. For the
> Thurstone example, these would be, in addition to the variances already set
> to 1, F1 <-> F2, F1 <-> F3, and F2 <-> F3.

Ok I understand the second order part in relation to F4.

I'm afraid I'm a bit slow on the last part.

"Fn <-> Fn 	NA	1" is the variance for the factor n.
"Fn -> Item.a   lam.z	NA" is the grouping of the items to each factor
"Fn <-> Fm      gam.w	NA" I take is the covariance among factors.

Is this correct? Do I need to set variances for each item (Item.a <-> 
Item.a)? 

Saluti,
Antonio Prioglio

-- 
We are what we repeatedly do. Excellence, then, is not an act, but a habit.
							Aristoteles


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