[R] How to change the font size on the title of a xyplot

[David Winsemius]

On May 10, 2014, at 6:06 PM, Eduardo M. A. M. Mendes wrote:

> library(zoo);
> library(lattice);
> 
> a=matrix(runif(100),25,4);
> b=zoo(a,seq(1,25));
> names(b)=c("How to change the font size?","2","3","4");
> xyplot(b)
> 

xyplot(b, strip=strip.custom( par.strip.text=list(cex=.5)))

-- 
David.
> Ed
> 
> On May 10, 2014, at 9:52 PM, David Winsemius <dwinsemius at comcast.net> wrote:
> 
>> 
>> On May 10, 2014, at 5:47 PM, Eduardo M. A. M. Mendes wrote:
>> 
>>> Yes, you are right.  I meant panels,   xyplot generates 22 panels, which one with y-axis, x-axis and a title.  I need to change the font size of title in the panels.
>>> 
>> 
>> It appears to me that the answer is probably in :
>> 
>> ?strip.default
>> 
>> Still no example, so no code.
>> 
>> -- 
>> David.
>> 
>>> Ed
>>> 
>>> 
>>> 
>>> 
>>> On May 10, 2014, at 8:04 PM, David Winsemius <dwinsemius at comcast.net> wrote:
>>> 
>>>> 
>>>> On May 10, 2014, at 3:30 PM, Eduardo M. A. M. Mendes wrote:
>>>> 
>>>>> Hello
>>>>> 
>>>>> Many thanks.
>>>>> 
>>>>> par.main.text is the main title (on top of all plots).  I need to change the each of the titles in the, say, subplots.
>>>>> 
>>>> 
>>>> One gets the response the fills ones needs when those needs are clearly expressed and an example provide that illustrates the problem. There being no "subplot" in lattice, I'm guessing that you mean "panel" for that term,  and the "title" is in fact the strip annotation, but I am finished with throwing out guesswork solutions until clarity is established.
>>>> 
>>>> -- 
>>>> David.
>>>> 
>>>>> Ed
>>>>> 
>>>>> 
>>>>> On May 10, 2014, at 7:05 PM, David Winsemius <dwinsemius at comcast.net> wrote:
>>>>> 
>>>>>> 
>>>>>> On May 10, 2014, at 2:26 PM, Eduardo M. A. M. Mendes wrote:
>>>>>> 
>>>>>>> Hello
>>>>>>> 
>>>>>>> I am using xyplot (lattice) to plot a xts variable.  There are 20 variables within the xts variable (index by a datetime vector sampled every 1 minute).  The results are very nice and help me to understand what is going on with the data. However since the names (labels of each variable) within the xts variable are large, the title of each plot is cropped.   How can I select the font size of the titles without changing all other fonts?
>>>>>>> 
>>>>>> 
>>>>>> tp <- trellis.par.get()
>>>>>> names(tp)
>>>>>> 
>>>>>> ... includes "par.main.text", so my first try was to use the xyplot() facilities to change cex for 'main'. Seems to work as expected:
>>>>>> 
>>>>>> xyplot( 1~1, main="test", par.settings=list(par.main.text=list(cex=5)))
>>>>>> 
>>>>>> --
>>>>>> 
>>>>>> David Winsemius
>>>>>> Alameda, CA, USA
>>>>>> 
>>>>> 
>>>> 
>>>> David Winsemius
>>>> Alameda, CA, USA
>>> 
>> 
>> David Winsemius
>> Alameda, CA, USA
> 

David Winsemius
Alameda, CA, USA