[R] Creating a flat legend 'grob' for lattice xyplot

[Mark]

Hi,

I want my xyplot legend to be flat, not tall, and there seems to be no way
for xyplot's auto.key and key elements to do this: I tried many, many
permutations of what I could find in the archives and reading the
documentation.  If there there's a way to make it flat, please tell me what
the magic incantation is.

Here's a simple example of what I like to see.  The xyplot will be a
multi-panelled one with a single,
flat legend below.  It seems the xyplot's legend element is the way to go --
the option I haven't tried because I don't know what or how to create a grob
of this kind.  Where to start?

xyplot(1~1)
legend(0.15,-0.125,
bty='n',pch=rep(c(15,17),2),col=c('brown','green','blue','red'),ncol=4,
          legend=c('How','to make','this into', 'a grob?'))

Thanks!



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