[R] Mathematical expressions in the group labels in lattice

David Winsemius dwinsemius at comcast.net
Tue Sep 13 15:30:31 CEST 2011


On Sep 13, 2011, at 8:30 AM, Timo Schmid wrote:

>
> Hi,
>
> I am working with the lattice package and I want to label to groups  
> in the xyplots with mathematical expressions.
> I short example for this
>
> library(lattice)
>
> Case<-factor(rep(1:2,each=300))
> xx<-rnorm(600,0,1)
> yy<-rnorm(600,0,1)
> xyplot(yy~xx|Case)
>
> This results in two scatter plots with label "1" and "2". I would  
> like to substitute this labels by math expression. I used the  
> following code
>
> Case<-factor(rep(1:2,each=300))
> levels(Case) <- c(expression(R^2),expression(sigma_[i]))
> xx<-rnorm(600,0,1)
> yy<-rnorm(600,0,1)
> xyplot(yy~xx|Case)
>
> But the label did not change to mathematical expressions. Any ideas?

You should be looking at the strip.custom function. It has worked  
examples.


> Thank you very much for your help.


-- 
David Winsemius, MD
West Hartford, CT



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