Message-ID: <3B416552.117D4EFC@statistik.uni-dortmund.de>
Date: 2001-07-03T06:25:22Z
From: Uwe Ligges
Subject: How do one modify an expression?
Henrik Bengtsson wrote:
>
> I am using expressions to annotate x and y labels in plots. I start of with
> a label as
>
> xlab <- expression(X)
>
> Note that it is the user that sets this. It could also be something more
> complicated as expression(sqrt(R*G)). Can I easily add a log[2] "around"
> this expression? I would like to get
>
> xlab <- expression(log[2](X))
>
> I basically know nothing about expressions.
The following seems to work:
plot(1:10, xlab= expression(log[2](X)))
So I don't understand your question. For help on plot annotation have a
look at:
?plotmath
Uwe Ligges
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