[R] lattice: reverse order of panel.lmline, panel.smooth

[Dylan Beaudette]

On Fri, Jan 23, 2009 at 4:45 PM, Deepayan Sarkar
<deepayan.sarkar at gmail.com> wrote:
> On Fri, Jan 23, 2009 at 3:00 PM, Dylan Beaudette
> <debeaudette at ucdavis.edu> wrote:
>> Hi,
>>
>> is it possible to reverse the order in which panel.lmline() or panel.smooth()
>> operation in xyplot() ? This type of situation might occur when plotting some
>> variable with depth, but the relation we want to describe is variable ~
>> depth, and not depth ~ variable, as the plotting formula would suggest.
>>
>>
>> # an example:
>> d <- 1:100
>> v <- d * rnorm(100)
>> xyplot(d ~ v, ylim=c(100,0), type=c('p','r','smooth'))
>>
>> # points are positioned correctly, but the lmline and smoothed line are in
>> opposite the "desired" orientation. obviously xyplot() has no way of knowing
>> this, but can it be convinced?
>
> type="g", "smooth", "r", etc. are all convenience shortcuts for other
> panel functions (panel.grid, panel.loess, panel.lmline, respectively).
> Whenever you find its use limiting, you should consider writing an
> explicit panel function.
>
> In this case, simply adding 'horizontal=TRUE' will suffice for the
> smooth (it gets passed on to panel.loess), but not for panel.lmline
> (maybe I should add it 'horizontal' as an argument to it too).
>
> -Deepayan
>

Thanks Deepayan--

This was exactly what I was looking for. +1 on adding the 'horizontal'
argument to panel.lmline() !!

Cheers,

Dylan