[amelia] missmap() when there's no missing data

Hi, I'm surprised by the behaviour of missmap() when the argument is a dataframe with no missing data. It seems to plot everything as missing. I did not see this feature documented in the help. I also didn't find any thread about that in this mailing list. I realise this package is not for datasets without missing data, but this may still be misleading. Example : library(package = "Amelia") tabComplete <- data.frame(a = 1:10, b = 11:20, c = 21:30) missmap(tabComplete) # everything plotted missing is.na(tabComplete$a) <- 1 missmap(tabComplete) # works when at least one observation is missing Best regards, Antoine Filipovic Pierucci Institut national d'études démographiques INED 133 Bd Davout - 75 980 Paris 20 - France