Brian wrote:
> In your data frames, 'y' is a category
...
> The behaviour is compatible with S apart from the comment in=20
> the R help=20
> page. That categories are promoted to factors is consistent=20
> with the help for 'category'.
I have been around S and R for about 10 years, but had
never
In your data frames, 'y' is a category and the following comment in the
code makes clear this is deliberate.
if( !is.null(levels(xj)) ) {
all.levs[[j]] <- levels(xj)
facCol[j] <- TRUE # turn categories into factors
