[R] Legend containing maths symbol and values of variables

[Gabor Grothendieck]

For the legend argument try this:

leg = as.expression(c(sprintf("Up (>= %d)", threshold),
	"Normal", "Down", "NA"))

or use paste in place of sprintf.

On Mon, Mar 23, 2009 at 11:53 PM, Daren Tan <darentan76 at gmail.com> wrote:
> I need to have the maths symbol for >= in the legend, and to
> substitute threshold variable with its value. Somehow, various
> attempts weren't successful. Please help.
>
> threshold <- 0.5
>
> plot(NA, xlab="", ylab="", main="", axes=F, xlim=c(0,1), ylim=c(0,1),
> xaxs="i", yaxs="i")
> legend(x=0, y=1, fill=c("orange", "white", "green", "gray90"),
> cex=0.8, pt.cex=1.8, x.intersp=0.6, bg = "white",
>           legend=c(expression("Up (" >= threshold ")"), "Normal",
> "Down", "NA"), bty = "n")
>
> ______________________________________________
> R-help at r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
>