Using xyplot, I am plotting observed versus predicted values conditional to the
values of a third variable.
I would thus like to have an aspect ratio of 1 and the same axis range.
Since the range of the values differs substantially between panels, the axis
ranges shall be different for each panel (along the lines of relation="free").
However, x- and y-limits shall still be the same for a given panel.
Any ideas on how to achieve that?
# Example (that produces different x/y-limits per panel)
set.seed(3484)
x <- data.frame(
"x"=c(rnorm(10), rnorm(10, 10))
)
x$y <- x$x + rnorm(length(x$x))
x$z <- c(rep(c("A", "B"), c(10, 10)))
print(xyplot(y ~ x | z, data=x,
aspect=1,
scales=list(
relation="free"
),
panel=function(x, y, ...)
{
panel.abline(0, 1)
panel.xyplot(x, y, ...)
}
))
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