Dear R users, I know this is the wrong forum for such a question but I need help. I would like to write down the likelihood expression for a simple EM problem. I have one categorical covariate with 5 levels and a missing count which can fall in any of the categories. I know the solution to the problem but can't seem to get the likelihood expression correct (if it is possible). Thanks. Vumani Dlamini, Student Faculty of Health Sciences University of Natal