R help - Jul 2015 - Lattice: set col = "black" for box.rectangle and box.umbrella

On Thu, 2 Jul 2015, David Winsemius wrote:
> The lead-in to section 7.2 mentions `trellis.par.get`,  but in order to
> change anything you need to use `trellis.par.set` as was illustrated in
> the pages leading up to that section:
David,

   I saw `trellis.par.set` but did not know how to use that in
~/.Rprofile.
>
> trellis.par.set(box.umbrella=list(col="black"))
> bwplot(decrease ~ treatment, OrchardSprays)
> trellis.par.set(box.rectangle=list(col="black"))
> bwplot(decrease ~ treatment, OrchardSprays)
>
> Could do it all at once with:
>
> trellis.par.set(list(
>              box.umbrella=list(col="black"),
>              box.rectangle=list(col="black")
>                  )
>
> And Sarkar mentions that this form can be used to create a theme. You may
> want to investigate the function `standard.theme` and read section 7.1.4
> of that chapter again.
   Yes. Modifying the standard.theme would do the job, too.

Many thanks,

Rich

On Jul 2, 2015, at 9:57 AM, Rich Shepard wrote:
> On Thu, 2 Jul 2015, David Winsemius wrote:
> 
>> The lead-in to section 7.2 mentions `trellis.par.get`,  but in order to
>> change anything you need to use `trellis.par.set` as was illustrated in
>> the pages leading up to that section:
> 
> David,
> 
> I saw `trellis.par.set` but did not know how to use that in ~/.Rprofile.
My .Rprofile has this (among other items):

lattice.options(default.args = list(page = function(n) {
  panel.text(lab = sprintf("%s", date()), x = 0.01, y = 0.01, adj = 0,
srt=90)
}))

It prints a "timestamp" along any Lattice plot I make. I think I
picked it several years ago from an R-help posting bt someclever person whose
name I am not remembering at the moment.

-- 
David.
>> 
>> trellis.par.set(box.umbrella=list(col="black"))
>> bwplot(decrease ~ treatment, OrchardSprays)
>> trellis.par.set(box.rectangle=list(col="black"))
>> bwplot(decrease ~ treatment, OrchardSprays)
>> 
>> Could do it all at once with:
>> 
>> trellis.par.set(list(
>>            box.umbrella=list(col="black"),
>>            box.rectangle=list(col="black")
>>                )
>> 
>> And Sarkar mentions that this form can be used to create a theme. You
may
>> want to investigate the function `standard.theme` and read section
7.1.4
>> of that chapter again.
> 
> Yes. Modifying the standard.theme would do the job, too.
> 
> Many thanks,
> 
> Rich
> 
> ______________________________________________
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> and provide commented, minimal, self-contained, reproducible code.
David Winsemius
Alameda, CA, USA

On Thu, 2 Jul 2015, David Winsemius wrote:
> My .Rprofile has this (among other items):
   ...

David,

   My attempts at adding lattice.options to .Rprofile fail. In that file is

lattice.options(trellis.par.set(list(
                 box.umbrella=list(col="black"),
   		box.rectangle=list(col="black")
                      )
 		))

and invoking R within emacs displays this warning:

Warning message:
In trellis.par.set(list(box.umbrella = list(col = "black"),
box.rectangle = list(col = "black"))) :
   Note: The default device has been opened to honour attempt to modify trellis
settings
[Previously saved workspace restored]

   Removing the enclosing lattice.options() produces the same error. In
section 7.1.4 I'm not groking the correct syntax to change the color of both
box items within ~.Rprofile.

Rich