[R] Changing strip var.name value on lattice::xyplot

[ernesto]

Hi,

I want to use a different text for the strips of my xyplot but I'm
failing to do it. Can someone check on the following and comment ?

Thanks

EJ

xyplot(rnorm(100)~1:100|factor(rep(c(1,2),50)),
strip=strip.custom(var.name=c("M","F")))