Dear all,
How can I make an index plot with lattice, that is plotting a vector
simply against its particular index in the vector, i.e. something
similar to
y <- rnorm(10)
plot(y)
I don't want to specify the x's manually, as this could become
cumbersome when having multiple panels.
I tried something like
library(lattice)
mp <- function(x, y, ...) {
x <- 1:length(y)
panel.xyplot(x, y, ...)
}
pp <- function(x, y, ...) {
list(xlim = extendrange(1:length(y)), ylim = extendrange(y))
}
set.seed(123)
y <- rnorm(10)
xyplot(y ~ 1, panel = mp, prepanel = pp, xlab="Index")
but I was wondering whether there is a more straightforward way?
By the way, if I do not specify the ylim in the prepanel function the
plot is clipped, but reading Deepayan's book, p.140 :
"[...], so a user-specified prepanel function is not required to return
all of these components [i.e. xlim, ylim, xat, yat, dx and dy]; any
missing component will be replaced by the corresponding default."
I'd understand that if I do not specify ylim it is calculated
automatically? Not a big thing though, but it seems to me to be
inconsistent.
Any help appreciated.
KR,
-Thorn
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