The problem is that you have not pushed your viewport so it doesn't
exist in the plot. (You only pushed the layout viewport).
> grid.ls(viewports = TRUE)
ROOT
GRID.VP.82
Try this:
vp <- vplayout(2,2)
pushViewport(vp)
upViewport()
grid.ls(viewports = TRUE)
#ROOT
# GRID.VP.82
# GRID.VP.86
print(p, newpage = FALSE, draw.in = vp$name)
-Felix
On 13 July 2010 01:22, Mark Connolly <wmcon...@ncsu.edu> wrote:
> require("grid")
> require("lattice")
> fred = data.frame(x=1:5,y=runif(5))
> vplayout <- function (x,y) viewport(layout.pos.row=x, layout.pos.col=y)
> grid.newpage()
> pushViewport(viewport(layout=grid.layout(2,2)))
> p = xyplot(y~x,fred)
> print( p,newpage=FALSE,draw.in=vplayout(2,2)$name)
>
>
> On Mon, Jul 12, 2010 at 8:58 AM, Felix Andrews <fe...@nfrac.org> wrote:
>>> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
>>> and provide commented, minimal, self-contained, reproducible code.
>>
>> Yes, please, reproducible code.
>>
>>
>>
>> On 10 July 2010 00:49, Mark Connolly <wmcon...@ncsu.edu> wrote:
>>> I am attempting to plot a trellis object on a grid.
>>>
>>> vplayout = viewport(layout.pos.row=x, layout.pos.col=y)
>>>
>>> grid.newpage()
>>> pushViewport(viewport(layout=grid.layout(2,2)))
>>>
>>> g1 = ggplot() ...
>>> g2 = ggplot() ...
>>> g3 = ggplot() ...
>>> p = xyplot() ...
>>>
>>> # works as expected
>>> print(g1, vp=vplayout(1,1))
>>> print(g2, vp=vplayout(1,2))
>>> print(g3, vp=vplayout(2,1))
>>>
>>> # does not work
>>> print( p,
>>> newpage=FALSE,
>>> draw.in=vplayout(2,2)$name)
>>>
>>> Error in grid.Call.graphics("L_downviewport", name$name, strict) :
>>> Viewport 'GRID.VP.112' was not found
>>>
>>>
>>> What am I doing wrong?
>>>
>>> Thanks!
>>>
>>> ______________________________________________
>>> R-help@r-project.org mailing list
>>> https://stat.ethz.ch/mailman/listinfo/r-help
>>> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
>>> and provide commented, minimal, self-contained, reproducible code.
>>>
>>
>>
>>
>> --
>> Felix Andrews / 安福立
>> http://www.neurofractal.org/felix/
>>
>
--
Felix Andrews / 安福立
http://www.neurofractal.org/felix/
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