Use the lattice package:
library(lattice)
histogram( ~ escore | inst, data=X)
if X is your data.frame object.
Dirk Eddelbuettel
2009-10-05 17:46:21
+8
A:
You can't beat lattice for it's beauty in conditioning.
Vince
2009-10-05 18:02:49
@Dirk - that definitely worked. What does specifying the "pipe" (|) do in this particular command?@Vince - agreed. This did exactly what I wanted.
briandk
2009-10-05 18:36:42
In the lattice framework, you specify the conditioning variable after the "pipe" symbol. There are lots and lots of options -- see the help page, the lattice book and online tutorials you may find via Google.
Dirk Eddelbuettel
2009-10-05 18:38:36