When exactly one case is missing in a data column, plot.amelia includes
that column in those to be plotted. However, if compare=TRUE (the
default), the call to compare.density() fails with the fatal error
message "need at least 2 points to select a bandwidth automatically".
Now that I know, I can work around it; but either the case could be
avoided or Amelia could provide its own message to be more informative?
Cheers, Paul.