>>>>> "BDR" == Prof Brian Ripley <[EMAIL PROTECTED]>
>>>>> on Fri, 23 Apr 2004 08:21:34 +0100 (BST) writes:
<........>
BDR> It is a matter for discussion (with the lattice
BDR> maintainer) whether trellis.device should help you out
BDR> here by importing the devices from package graphics. I
BDR> think adding (conditionalized on the platform)
BDR> importFrom(graphics, windows, postscript, pdf, pictex,
BDR> win.metafile, win.print, png, jpeg, bmp, xfig, bitmap)
BDR> to its NAMESPACE might be worth considering.
BDR> Alternatively, device.call <- get(device) could be put
BDR> in a try call, followed by a try on
BDR> getFromNamespace("graphics", device).
That's a very good idea, I'd support quite a bit.
I think I would go with the alternative approach
(where you probably meant to say device <- getOption("device") first?),
since the importFrom(..) approach leeds to a somewhat tedious maintenance
effort to keep up the list of available devices for the different platforms
(For MacOS X one has to include quartz() only in the situations
where it's available) where as Deepayan (the lattice
maintainer) could rely on getOption("device") to be ok
{and as you proposed would be on guard using try() or its newer siblings}.
Martin
BDR> BDR
BDR> On Fri, 23 Apr 2004, Prof Brian Ripley wrote:
>> 1) On the first point, please do read the NEWS file for R
>> 1.9.0.
>>
>> .Rprofile and .First have always been run before the
>> default packages are loaded in .First.sys, to allow them
>> to be changed.
>>
>> So this *is* a documented change in behaviour, not a bug.
>> If I do
>>
>> .First <- function() {library(lattice); trellis.device()}
>>
>> This happens on all platforms. You need
>>
>> .First <- function() {library(graphics);
>> library(lattice); trellis.device()}
>>
>> That is true of starting any graphics device in .Rprofile
>> or .First.
BDR> -- Brian D. Ripley, [EMAIL PROTECTED] Professor of
BDR> Applied Statistics, http://www.stats.ox.ac.uk/~ripley/
BDR> University of Oxford, Tel: +44 1865 272861 (self) 1
BDR> South Parks Road, +44 1865 272866 (PA) Oxford OX1 3TG,
BDR> UK Fax: +44 1865 272595
BDR> ______________________________________________
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