[R] Variables and greek letters in a plot title

[peter dalgaard]

On Aug 16, 2012, at 09:37 , Dominik Refardt wrote:

> Hello
> 
> This is a problem I encountered repeatedly and I found no answer that made
> me really happy. I hope it is not too trivial.
> 
> I would like to give the concentration of a substance in a plot title:
> 
> 5 ug/ml substance
> 
> the '5' would be a variable and the ug should be micrograms (with greek
> letter mu). It is the mu that causes the problems for me. I failed using
> various combinations of paste, expression and bquote. I would be very
> grateful if someone could help me (or point me to the solution, which I
> might have overlooked).

Like this?

plot(0,0)
conc <- 5
title(main=bquote(.(conc)*" "*mu*g/ml*" substance"))

-- 
Peter Dalgaard, Professor
Center for Statistics, Copenhagen Business School
Solbjerg Plads 3, 2000 Frederiksberg, Denmark
Phone: (+45)38153501
Email: pd.mes at cbs.dk  Priv: PDalgd at gmail.com