R help - Jul 2005 - pdf() black&white; panel titles in lattice

Hello,

I have two questions: 

1. How can I get black and white graphics using the pdf()
device? I have tried pdf(Name.pdf, bg="white", fg"black"),
but
I still get  full-color graphics.

2. When using lattice, how do I change the title for each
panel?  By default it uses the categories of the grouping
factor. I would like to modify the labels in the graphic
without changing the data. Also, how do I add a title above
the graphic referring to this factor (not the main title of
the graph)? The title for the xlab refers to the independent
factor within each panel. I would like to explain what each
panel represents with something similar to xlab, this title
being above the graphic if possible.

Thanking you in adavance,
Francisco 
Francisco Torreira
Spanish, Italian and Portuguese
Univ. of Illinois at Urbana-Champaign
707 South Mathews Aven.
4031 FLB
Urbana, IL, 61801

On 7/15/05, ftorrei2 at uiuc.edu <ftorrei2 at uiuc.edu>
wrote:
> Hello,
> 
> I have two questions:
> 
> 1. How can I get black and white graphics using the pdf()
> device? I have tried pdf(Name.pdf, bg="white",
fg"black"), but
> I still get  full-color graphics.
See ?trellis.device, specifically the 'color' argument.
> 2. When using lattice, how do I change the title for each
> panel?  By default it uses the categories of the grouping
> factor. I would like to modify the labels in the graphic
> without changing the data. 
See the entry for 'strip' in ?xyplot, as well as ?strip.default. For
one conditioning variable this can be as simple as

xyplot(Sepal.Length ~ Sepal.Width | Species, iris, 
    strip = strip.custom(factor.levels = c("I. setosa", 
                                  "I. versicolor", "I.
verginica")))

or 

xyplot(Sepal.Length ~ Sepal.Width | Species, iris, 
    strip = strip.custom(factor.levels = 
        expression(italic("I. setosa"), 
                         italic("I. versicolor"), 
                         italic("I. verginica"))))

> Also, how do I add a title above
> the graphic referring to this factor (not the main title of
> the graph)? The title for the xlab refers to the independent
> factor within each panel. I would like to explain what each
> panel represents with something similar to xlab, this title
> being above the graphic if possible.
You may be satisfied with 

xyplot(Sepal.Length ~ Sepal.Width | Species, iris, 
          strip = strip.custom(strip.names = TRUE))

If not, use the 'key' argument (described in ?xyplot).

Deepayan

Thank you so much for your help. Now I think I can use R for
everything I need so far. However I think that I haven't found
a solution for my first question. trellis.device(color=F) only
affects the trellis device, but not the pdf device, doesn??t
it? At least that is my impression. I manage to get black and
white graphics in trellis, but whenever I switch on the pdf
device, the resulting pdf file is in color, even if I specify
 pdf(X.pdf, bg="white", fg="black") (I wonder what the use
of
bg and fg is). The thing is that I need black and white
graphics for my papers. I am using R on OSX. Does this happen
to anyone else?

Thanks again 

---- Original message ----
>Date: Fri, 15 Jul 2005 12:16:36 -0500
>From: Deepayan Sarkar <deepayan.sarkar at gmail.com>  
>Subject: Re: [R] pdf() black&white; panel titles in lattice  
>To: "ftorrei2 at uiuc.edu" <ftorrei2 at uiuc.edu>
>Cc: r-help at stat.math.ethz.ch
>
>On 7/15/05, ftorrei2 at uiuc.edu <ftorrei2 at uiuc.edu> wrote:
>> Hello,
>> 
>> I have two questions:
>> 
>> 1. How can I get black and white graphics using the pdf()
>> device? I have tried pdf(Name.pdf, bg="white",
fg"black"), but
>> I still get  full-color graphics.
>
>See ?trellis.device, specifically the 'color' argument.
>
>> 2. When using lattice, how do I change the title for each
>> panel?  By default it uses the categories of the grouping
>> factor. I would like to modify the labels in the graphic
>> without changing the data. 
>
>See the entry for 'strip' in ?xyplot, as well as
?strip.default. For
>one conditioning variable this can be as simple as
>
>xyplot(Sepal.Length ~ Sepal.Width | Species, iris, 
>    strip = strip.custom(factor.levels = c("I. setosa", 
>                                  "I. versicolor", "I.
verginica")))
>
>or 
>
>xyplot(Sepal.Length ~ Sepal.Width | Species, iris, 
>    strip = strip.custom(factor.levels = 
>        expression(italic("I. setosa"), 
>                         italic("I. versicolor"), 
>                         italic("I. verginica"))))
>
>
>> Also, how do I add a title above
>> the graphic referring to this factor (not the main title of
>> the graph)? The title for the xlab refers to the independent
>> factor within each panel. I would like to explain what each
>> panel represents with something similar to xlab, this title
>> being above the graphic if possible.
>
>You may be satisfied with 
>
>xyplot(Sepal.Length ~ Sepal.Width | Species, iris, 
>          strip = strip.custom(strip.names = TRUE))
>
>If not, use the 'key' argument (described in ?xyplot).
>
>Deepayan
Francisco Torreira
Spanish, Italian and Portuguese
Univ. of Illinois at Urbana-Champaign
707 South Mathews Aven.
4031 FLB
Urbana, IL, 61801