lattice: showing panels for factor levels with no values

Wolfram Fischer wrote (

Is there an option to show empty panels for "Grand Rapids" in
``my.barley''?

Deepayan
No, unused factor levels are dropped. I'll see if adding an option for this
is feasible.

Dieter Menne:

See also

http://maths.newcastle.edu.au/~rking/R/help/01c/2820.html

Deepayan, at that time I received an e-mail (not in the archives) from you
saying that this feature was already in the code, but not yet active (quoted
from memory).


Dieter Menne