[R] Legend containing maths symbol and values of variables

Daren Tan darentan76 at gmail.com
Tue Mar 24 07:52:37 CET 2009


I tried sprintf and paste, which solves one of my problem i.e.
replacing the variable name by its value. However, >= is not renderend
correctly as the inequality symbol.

On Tue, Mar 24, 2009 at 12:24 PM, Gabor Grothendieck
<ggrothendieck at gmail.com> wrote:
> 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")
>>
>> ______________________________________________
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>> 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.
>>
>




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