[R] lattice: how to "center" a subtitle?

[David Winsemius]

On Apr 4, 2011, at 12:45 PM, Marius Hofert wrote:

> Dear David,
>
> I intended to use another x-label. But your suggestion brings me to  
> the idea of just using a two-line xlab, so s.th. like
> print(xyplot(0 ~ 0, xlab.top = "This title is now 'centered' for the  
> human's eye", xlab = "but subtitles are _now_ centered\nbla", scales  
> = list(alternating = c(1,1), tck = c(1,0))))

And if you wanted different fontface (underline, italic or bold) then  
you could use plotmath expressions:

xyplot(0 ~ 0, xlab.top = "This title is now 'centered' for the human's  
eye", xlab =  
expression( atop(but~subtitles2~are~underline(now)~centered,  
bold(bla) )), scales = list(alternating = c(1,1), tck = c(1,0)))

-- 
David.

>
> Thanks!
>
> Cheers,
>
> Marius
>
> On 2011-04-04, at 16:47 , David Winsemius wrote:
>
>>
>> On Apr 4, 2011, at 7:39 AM, Marius Hofert wrote:
>>
>>> Dear expeRts,
>>>
>>> I recently asked for a real "centered" title (see, e.g., http://tolstoy.newcastle.edu.au/R/e13/help/11/01/0135.html) 
>>> .
>>> A nice solution (from Deepayan Sarkar) is to use "xlab.top"  
>>> instead of "main":
>>>
>>> library(lattice)
>>> trellis.device("pdf")
>>> print(xyplot(0 ~ 0, xlab.top = "This title is now 'centered' for  
>>> the human's eye", sub = "but subtitles are not centered", scales =  
>>> list(alternating = c(1,1), tck = c(1,0))))
>>> dev.off()
>>
>> library(lattice)
>> trellis.device("pdf")
>> print(xyplot(0 ~ 0, xlab.top = "This title is now 'centered' for  
>> the human's eye", xlab = "but subtitles are _now_ centered", scales  
>> = list(alternating = c(1,1), tck = c(1,0))))
>> dev.off()
>>
>>
>> (I realize that those are not really subtitles by a 'lab', but that  
>> appears acceptable in your current test case.)
>>
>>>
>>> My question is whether there is something similar for *sub*titles  
>>> [so something like "xlab.bottom"]? As you can see from the plot,  
>>> the subtitle does not seem to be "centered" for the human's eye. I  
>>> would like to center it according to the x-axis label.
>>>
>>
>>
>> David Winsemius, MD
>> West Hartford, CT
>>
>

David Winsemius, MD
West Hartford, CT