[R] symbols in lattice

[Paul Murrell]

Hi


> > 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.


Unfortunately, grid.text() does not handle mathematical expressions yet (and
will not in grid_0.6 which will be released with R 1.5.0).  It is on the
todo list.

Paul


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