[R] Controlling Order of Panels in Lattice Trellis Plots

[Rich Shepard]

On Fri, 22 Feb 2013, David Winsemius wrote:

> `is.ordered` will return TRUE if it is an ordered factor. That's not what
> you want to know and using `as.ordered` would also fail to provide the
> needed ordering. You need to provide a proper levels argument to the
> factor function. And you will find that making an ordered factor will
> probably have undesirable side effects.

   Thank you, David. That was the conclusion I was approaching as I tried
is.ordered and as.ordered and saw they did not affec the needed changes.
I'll look at levels or sort the input data file before reading it into R.

Rich