[R] Greek in text()

[Uwe Ligges]

Bill Simpson wrote:
> 
> I have gone over the examples and can't figure this out:
> rho<-.77
> text(x=.05,y=.5,paste(expression(rho),rho))
> 
> I was hoping to get this to print a Greek rho with 0.77 beside it.
> Instead I get: rho 0.77 (i.e. Roman lettering)
> The help on expression() is quite opaque so I don't understand how it
> works.

It's described in ?plotmath. You can use

 text(x=.05,y=.5,substitute(paste(rho, rho2), list(rho2=rho)))

or maybe without that paste() something like:

 text(x=.05, y=.5, substitute(rho == rho2, list(rho2=rho))) 


Uwe Ligges
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