[R] is this trellis device or standard graphics device?

[Paul Murrell]

Hi


Prasenjit Kapat wrote:
> OK, here is the issue:
> I have a graphcis device (say X11) which I can set as active by
> dev.set(n). Is there ANY way to identify/infer whether this X11 device
> was obtained from a lattice function (like xyplot, levelplot...) or a
> standard function (like plot, scatterplot,...).


You could call the grid function getNames() and if that is zero-length,
then the device is either blank or only contains traditional graphics.


> A related question is whether plot.new (or frame) was called to obtain
> this graphics device...


Try ...

recordPlot()[[1]][[1]]

... which should look something like this after plot.new() ...

[[1]]
.Primitive("plot.new")

[[2]]
NULL

... though you're starting to get on shakier ground here.

Paul



> Thanks.
> PK
> 
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-- 
Dr Paul Murrell
Department of Statistics
The University of Auckland
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