[amelia] Hard to trace error message -- was: MI with categorical survey data: specifying vars as noms or ords?

Hello everybody Thanks to Levi and Matt, I am clear now about the numeric/ords/noms assigning and I am also using the whole dataset (N=2441). But when I call Amelia, I still get that error message and a few warnings: - The error message says "Missing value, where T/F was expected.", but Amelia does not specify -where- this happens. I ran traceback() right after but the output is not telling me much either (see below). How can I locate more precisely where Amelia stumbles? - Re the warnings: What is the problem if nominal variables have more than 10 categories? Thank you very much for your help, Marcus PS. I can provide more details on the Amelia call if needed. # CALL + outname="Routput/imputed", write.out=TRUE,empri=NULL) Fehler in if (any(unique(na.omit(data[, i]))%%1 != 0)) { : Fehlender Wert, wo TRUE/FALSE nötig ist Additional: Warning messages: 1: The number of catagories in one of the variables marked nominal has greater than 10 categories. Check nominal specification. in: amcheck(data = data, m = m, idvars = numopts$idvars, priors = priors, 2: ... (dto. up to 5: ) 6: '%%' is not meaningful for ordered factors in: Ops.ordered(unique(na.omit(data[, i])), 1) # TRACEBACK 3: amcheck(data = data, m = m, idvars = numopts$idvars, priors = priors, empri = empri, ts = numopts$ts, cs = numopts$cs, tolerance = tolerance, casepri = casepri, polytime = polytime, lags = numopts$lags, leads = numopts$leads, logs = numopts$logs, sqrts = numopts$sqrts, lgstc = numopts$lgstc, p2s = p2s, frontend = frontend, archive = archive, intercs = intercs, noms = numopts$noms, startvals = startvals, ords = numopts$ords, collect = collect, outname = outname, write.out = write.out) 2: amelia.prep(data = data, m = m, idvars = idvars, empri = empri, ts = ts, cs = cs, tolerance = tolerance, casepri = casepri, polytime = polytime, lags = lags, leads = leads, logs = logs, sqrts = sqrts, lgstc = lgstc, p2s = p2s, frontend = frontend, archive = archive, intercs = intercs, noms = noms, startvals = startvals, ords = ords, incheck = incheck, collect = collect, outname = outname, write.out = write.out, arglist = arglist, priors = priors, autopri = autopri) 1: amelia(mdi, m = 5, p2s = 0, idvars = skip, noms = noms, ords = ords, collect = FALSE, outname = "Routput/imputed", write.out = TRUE, empri = NULL) -- Marcus M. Dapp | PhD student | ETH Zurich | www.ib.ethz.ch/people/mdapp Prof. Thomas Bernauer, International Relations | www.ib.ethz.ch On the shoulders of giants? http://science.creativecommons.org - Amelia mailing list served by Harvard-MIT Data Center [Un]Subscribe/View Archive: http://lists.gking.harvard.edu/?info=amelia