I am trying to use the CCTpack package for R, especially the
cctscree() function, but keep getting the error message
#Console Output >cctscree (IT) ...Ordinal (categorical) data detected ...885 respondents and 12 items ...Producing Scree Plot Likely variables with missing values are Error in fac(r = r, nfactors = nfactors, n.obs = n.obs, rotate = rotate, : I am sorry: missing values (NAs) in the correlation matrix do not allow me to continue. Please drop those variables and try again.
I don't know where there should be NAs in my data and
fac() itself is working fine. What exactly dows the error message mean and how can I get
cctscree() to work with my data?