[R] Legend in plot: symbol for mean and standard deviation

[Marco Kienzle]

Dear list,

I am facing the following problem with the legend of a plot that display
the mean and variance of a measurement y as a function of x, the mean
being represented by a dot and the variance by a vertical line.

My problem is that I am unable to display the symbol (dot + vertical
line) in the legend. 


any help is welcome,
thanks
marco
-- 
____________________________________________________________________________

Marco Kienzle
Fisheries Research Services
Marine Laboratory
PO Box 101 Victoria Road
Aberdeen AB119DB
United Kingdom
 
direct: +44 (0) 1224 295421
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http://www.marlab.ac.uk