I am currently working with R's polycor package and I have encountered a
problem. I tried to follow the steps as outlined in the sem.pdf file where
a CFA model is run using polychoric correlations. Every time I run the
command sem(model, data, N=.), I get the following warning message:
Warning message:
In if (orthogonal) { :
the condition has length > 1 and only the first element will be used
Below is the code that I am using for my dataset. I also tried to copy and
paste the code from the sem.pdf file using data from CNES but I still get
an error message.
Any help would be much appreciated.
> germany2009 <- read.dta("StataforR.dta")
> #attach(germany2009)
> viewData(germany2009)
> #
> hcor <- function(data) hetcor(data, std.err=F, pd=T)$correlations
> hetcor=hcor(germany2009)
> hetcor
cdupid MERKELLIKE CDULIKE MERKELPROX CDUPROX
cdupid 1.0000000 0.5073577 0.6070514 -0.4064925 -0.4146810
MERKELLIKE 0.5073577 1.0000000 0.7832340 -0.4405571 -0.4200360
CDULIKE 0.6070514 0.7832340 1.0000000 -0.4868895 -0.5042006
MERKELPROX -0.4064925 -0.4405571 -0.4868895 1.0000000 0.8789219
CDUPROX -0.4146810 -0.4200360 -0.5042006 0.8789219 1.0000000
> viewData(hetcor)
> cdu= ' CDULIKE ~ cdupid + CDUPROX
+ MERKELLIKE ~ cdupid + MERKELPROX
+ CDUPROX ~ ~ cdupid
+ cdupid ~ ~ MERKELPROX
+ CDUPROX ~ ~ MERKELPROX
+ MERKELLIKE ~ 1
+ CDULIKE ~1 '
> sem.cdu= sem(cdu, hetcor, N=1861, meanstructure=F,fixed.x=F)
Warning message:
In if (orthogonal) { :
the condition has length > 1 and only the first element will be used
> sem.cdu= sem(cdu, hetcor, meanstructure=F,fixed.x=F)
Warning message:
In if (orthogonal) { :
the condition has length > 1 and only the first element will be used
> summary(sem.cdu)
--
Laura Schwirz
PhD Candidate and IRCHSS Scholar
Department of Political Science
Trinity College Dublin
Dublin 2
Republic of Ireland
Email: schwi...@tcd.ie
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