Dear David,

thanks for the hint, I completely forgot about phantom(). With that, I can 
solve the problem:

library(lattice)
xyplot(0~0, xlim=c(0,3), scales=list(x=list(at=c(1,1.1),    
                                     labels=c(expression(hat(theta)[italic(n)]),
                                     
expression(phantom(hat(theta)[italic(n)])*theta*phantom(hat(theta)[italic(n)]))))))

I use phantom() to put the expression with the largest height to the left of 
the smaller label. Then I also put it on the right side of the smaller label in 
order to center the label again. It's certainly dirty, but it solves the 
problem :-)

Cheers,

Marius

On 2011-07-09, at 24:12 , David Winsemius wrote:

> 
> On Jul 8, 2011, at 6:54 PM, Marius Hofert wrote:
> 
>> Dear expeRts,
>> 
>> How can I vertically adjust an axis tick label so that it is nicely aligned 
>> with
>> the other labels?
>> 
>> library(lattice)
>> xyplot(0~0, xlim=c(0,3), scales=list(x=list(at=c(1,1.1), 
>> labels=c(expression(hat(theta)[italic(n)]),expression(theta)))))
>> ## aim: move the leftmost expression up so that theta is nicely aligned with 
>> the second
> 
> I don't know how to make a phantom <hat>,  so see if this is any more 
> aesthetically acceptable:
> 
> xyplot(0~0, xlim=c(0,3), scales=list(x=list(at=c(1,1.1),    labels=c(
>      expression(atop(phantom(), hat(theta)[italic(n)])),
>       expression(atop(phantom(),theta))                     )
>        )))
> 
>> theta.
>> 
>> Cheers,
>> 
>> Marius
>> ______________________________________________
>> R-help@r-project.org mailing list
>> https://stat.ethz.ch/mailman/listinfo/r-help
>> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
>> and provide commented, minimal, self-contained, reproducible code.
> 
> David Winsemius, MD
> West Hartford, CT
> 

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