I am trying to run a confirmatory factor analysis using the SEM package. My
data are ordinal. I have read
http://socserv.mcmaster.ca/jfox/Misc/sem/SEM-paper.pdf.
When I apply the hetcor function, I receive the following error:
Error in checkmvArgs(lower = lower, upper = upper, mean = mean, corr = corr,
:
at least one element of 'lower' is larger than 'upper'
Example:
set.seed(781)
q1 <- cut2(x = rlnorm(n = 1e2, m = 2), cuts = seq(1,6))
q2 <- cut2(x = rlnorm(n = 1e2, m = 0), cuts = seq(1,6))
q3 <- cut2(x = rlnorm(n = 1e2, m = 1), cuts = seq(1,6))
dat <- data.frame(q1,q2,q3)
hetcor(data = dat, ML = T, pd = T, use = 'p')
Any help in understanding and correcting the error would be appreciated.
unlist(R.Version())
platform arch
"i386-pc-mingw32" "i386"
os system
"mingw32" "i386, mingw32"
status major
"" "2"
minor year
"9.0" "2009"
month day
"04" "17"
svn rev language
"48333" "R"
version.string
"R version 2.9.0 (2009-04-17)"
Respectfully,
Frank Lawrence
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