[R] Help with factanal and missing values

[Antonio Prioglio]

On Tue, 13 Jul 2004, John Fox wrote:
> 
> Two solutions are to use na.omit() to eliminate observations with missing
> data -- factanal(na.omit(datamatrix), factors=n) -- or to use a formula
> argument to factanal and pass the data as a data frame via the data argument
> -- factanal(~ var1 + ... + vark, factors=n, data=as.data.frame(datamatrix)).

Thanks this was helpful and more elegant than my solution to select the 
data with a call to complete.cases().

> 
> By the way, what factanal() does would conventionally be described as
> exploratory, not confirmatory, factor analysis. For the latter, you might
> try the sem package.
> 

Actually these CFAs are preliminary to a Path Analysis I had ambitions to 
do with the sem package rather than LISREL.

Could you give an example on how to do CFA with sem?

Saluti,
Antonio Prioglio

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


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