[R] symbols in lattice

[ripley@stats.ox.ac.uk]

On Tue, 16 Apr 2002, Torsten Hothorn wrote:

>
> Dear plotting experts,
>
> I simply can't figure out how I can force bwplot to print mathematical
> symbols in the strips.
>
> Example:
>
> x <- rnorm(30)
> lab <- factor(c(rep("one", 10), rep("two", 10), rep("three", 10)))
> bwplot(~ x | lab)
>
> gives labels "one", "two", "tree" but I would like to change this into
> expression(lambda == 1), expression(lambda == 2) and expression(lambda ==
> 3).
>
> The only way to modify the labels is changing the levels of lab, right? Or
> is there something else?

You can set your own strip function to replace strip=strip.default
However, I am not aware that grid functions (on which lattice is based) do
plotmath.  ?grid.text suggests not.

   label: A vector of strings to draw.


-- 
Brian D. Ripley,                  ripley at stats.ox.ac.uk
Professor of Applied Statistics,  http://www.stats.ox.ac.uk/~ripley/
University of Oxford,             Tel:  +44 1865 272861 (self)
1 South Parks Road,                     +44 1865 272860 (secr)
Oxford OX1 3TG, UK                Fax:  +44 1865 272595

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