the plotmath help page should give the answer
http://www.stat.ucl.ac.be/ISdidactique/Rhelp/library/base/html/plotmath.html
On Mar 24, 2:53 pm, Daren Tan <darenta...@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")
>
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> and provide commented, minimal, self-contained, reproducible code.
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