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

Lattice's bwplot() displays and prints (using pdf()) the box.rectangle and
box.umbrella in a pale blue that is a pale gray on b&w laser printer output.
I would like to set default options so the box and whiskers are displayed
and printed in black by modifying ~/.Rprofile by adding a .First() function.

   Reading Chapter 7 in Deepayan's book and the ?Startup man page did not
result in my understanding the correct syntax for
lattice.options(default.args = list(...)) in ~/.Rprofile. Web searches did
not find guidance, either.

   Would appreciate help on learning how to set these options so they are
effective when R is invoked.

Rich

On Jul 2, 2015, at 7:46 AM, Rich Shepard wrote:
>  Lattice's bwplot() displays and prints (using pdf()) the box.rectangle
and
> box.umbrella in a pale blue that is a pale gray on b&w laser printer
output.
> I would like to set default options so the box and whiskers are displayed
> and printed in black by modifying ~/.Rprofile by adding a .First()
function.
> 
>  Reading Chapter 7 in Deepayan's book and the ?Startup man page did not
> result in my understanding the correct syntax for
> lattice.options(default.args = list(...)) in ~/.Rprofile. Web searches did
> not find guidance, either.
> 
>  Would appreciate help on learning how to set these options so they are
> effective when R is invoked.
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:


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.

-- 

David Winsemius
Alameda, CA, USA

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