[R] lattice variable by page

[Sundar Dorai-Raj]

Sundar Dorai-Raj wrote:

> 
> 
> Matt Pocernich wrote:
> 
>> Hi,
>>
>> Using lattice's xyplot, is it possible to specify a variable to group
>> plots by page.  For example, if I have
>>
>> xyplot(y~x|A*B*C)
>>
>> could I get a page created for each unique value in
>> variable C ?  I am hoping to avoid having pages with the same strip above
>> each plot on a page.
>>
>> Thanks,
>>
>> M
>>
> 
> Others may have a better solution, but when I've done this in the past I 
> used a for loop with subset:
> 
> # assuming C is a factor to use nlevels
> for(ci in nlevels(C)) {
>   pl <- xyplot(y ~ x | A * B,
>                subset = C == ci,
>                main = paste("C ==", ci))
>   print(pl)
> }
> 
> HTH,
> --sundar
> 

Sorry made a typo: "nlevels" should be "levels".

--sundar