math mode in box plots

Here is another of those 'is it a bug or am I using it wrong'
questions:  I'd be very grateful if someone could help.

I am doing a lot of graphs for a thesis at the minute, many of which need
(ideally) greek letters in xlab and ylab.

This works:

plot(c(1,2,3,4),c(1,2,3,4),xlab=expression( alpha * "-1-m"))

This does not:

boxplot(c(1,2,3,4),c(1,2,3,4),xlab=expression( alpha * "-1-m"))

Error: Object "alpha" not found

Tried it on both 0.63 and 0.64 with same result.
Any help much appreciated:  the scatterplots look so much better with the
proper greek.

Regards,

Michael Lapsley
----------------------------------
E-Mail: Michael Lapsley <mlapsley at ndirect.co.uk>
Date: 20-Apr-99
Time: 00:23:47

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