[R] How to turn the xyplot graphics upside-down?

[Ben Bolker]

lau kue wrote:
> 
> Hi everyone,
> 
> I'm learning to use R. The below script works well, but i want to turn the
> y-axis and the graphics upside-down, how should i do? Appreciate if any
> tips!
> 
> 

Your example isn't reproducible (i.e. we don't have the data), so can't be
sure,
but try giving an explicit "ylim" argument with low and high limits
reversed.
For example:

> d <- data.frame(x=runif(100),y=runif(100))
> xyplot(y~x,data=d)
> xyplot(y~x,data=d,ylim=c(1,0))

or perhaps

> xyplot(y~x,data=d,ylim=rev(range(d$y)))
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