[R] lattice grob

[baptiste auguie]

Thanks Felix and Paul. I had overlooked grid.grabExpr, assuming that
one had to draw on a device before grabbing the output.

Now I'm not sure if there's any difference between either solution,
I'll go for the shortest.

Best,

baptiste

On 22 March 2010 00:18, Felix Andrews <felix at nfrac.org> wrote:
> What's wrong with using grid.grabExpr?
>
> p1 <- xyplot(1:10 ~ 1:10)
> g1 <- grid.grabExpr(print(p1))
>
> I can imagine there would be potential problems to do with the
> plot-time aspect and layout calculations...
>
>
>
> On 19 March 2010 21:51, baptiste auguie <baptiste.auguie at googlemail.com> wrote:
>> Dear list,
>>
>> I'm trying to arrange various grid objects on a page using a
>> frameGrob. It works fine with basic grobs (textGrob, gTree, etc.), and
>> also with ggplot2 objects using the ggplotGrob() function. I am
>> however stuck with lattice. As far as I understand, lattice produces a
>> list of class trellis, which is eventually displayed using the
>> plot.trellis method. I am not sure if/how one can convert this list
>> into a high-level grob. I tried the following,
>>
>> latticeGrob <- function(p, ...){
>>  grob(p=p, ..., cl="lattice")
>> }
>>
>> drawDetails.lattice <- function(x, recording=FALSE){
>>  lattice:::plot.trellis(x$p)
>> }
>>
>> p1 <- xyplot(1:10 ~ 1:10)
>> g1 <- latticeGrob(p1)
>>
>> grid.draw(g1) # works fine
>>
>> but,
>>
>> fg <- frameGrob(layout = grid.layout(1,1))
>> fg <- placeGrob(fg, g1, row = 1, col = 1)
>> grid.draw(fg)
>>
>> Error in UseMethod("depth") :
>>  no applicable method for 'depth' applied to an object of class "NULL"
>>
>> Ideas are most welcome,
>>
>> Best regards,
>>
>> baptiste
>>
>>> sessionInfo()
>> R version 2.10.1 RC (2009-12-06 r50690)
>> i386-apple-darwin9.8.0
>>
>> locale:
>> [1] en_GB.UTF-8/en_GB.UTF-8/C/C/en_GB.UTF-8/en_GB.UTF-8
>>
>> attached base packages:
>> [1] grid      tools     stats     graphics  grDevices utils
>> datasets  methods   base
>>
>> other attached packages:
>> [1] ggplot2_0.8.7   digest_0.4.1    reshape_0.8.3   plyr_0.1.9
>> proto_0.3-8     gridExtra_0.5   lattice_0.17-26 gtools_2.6.1
>>
>> ______________________________________________
>> R-help at 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
> Postdoctoral Fellow
> Integrated Catchment Assessment and Management (iCAM) Centre
> Fenner School of Environment and Society [Bldg 48a]
> The Australian National University
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>