[R] bold face labelling / expression

[Uwe Ligges]

Vera Hofer wrote:

> Dear colleagues,
> 
> I have a great problem in using "expression" for axes labels. I want the 
> labels in bold face (i.e.: par(font.lab=2)). When typing
> 
> boxplot(y ~ groups, names = "" , xlab = "", ylab = "", axes = F)
> axis(side=1, at=c(1,2), xlab=c(expression(H[2]*O),"others")),

1. If you don't mean "labels" instead of "xlab" in the axis() call, use 
xlab in the boxplot() call or in a call to title() (but then, you cannot 
use c(expression(), ...).

2. See ?plotmath and use, e.g., bold(H[2]*O) ...

Uwe Ligges


> I do not get a bold face labelling. Does anyone know, how I could proceed?
> Thank you very much.
> 
> Best regards
> V.H.
> 
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