x.fun - function( formula, data ) dotplot( formula, data )
x.grp - function( formula, groups, data ) dotplot( formula, groups, data )
data( barley )
x.fun( variety ~ yield | site, data=barley )
# no problem
dotplot( variety ~ yield | site, groups=year, data=barley )
# no problem
x.grp(
Don't know of a more straight forward way but this works. It constructs
a new call to bwplot from the one to x.grp2 and evaluates it in the
parent environment:
library(lattice)
x.grp2 - function(x, groups, data) {
cl - match.call()
cl[[1]] - as.name(bwplot)
eval.parent(cl)
}
x.grp2(
