[R] greek letters, text, and values in labels

[Marc Schwartz (via MN)]

On Tue, 2006-07-25 at 13:12 -0700, Adrian Dragulescu wrote:
> Hello,
> 
> I want to have a title that will look something like:
> "Results for \theta=2.1", given that I have a variable theta=2.1, and
> \theta should show on the screen like the greek letter.
> 
> I've tried a lot of things:
> theta <- 2.1
> plot(1:10, main=expression(paste("Results for", theta, "=", eval(theta))))
> 
> or using bquote
> plot(1:10, main=paste("Results for ", bquote(theta == .(theta))))
> 
> or using substitute, etc.  I could not make it work.  This should be easy.
> 
> I would appreciate your help.
> 
> Thanks,
> Adrian

Adrian,

Try this:

  theta <- 2.1
  plot(1:10, main = bquote(paste("Results For: ", theta == .(theta))))

You need to surround the full expression with bquote() so that the
paste()d text is within it. bquote() then returns an expression that is
passed to plotmath.

HTH,

Marc Schwartz