[R] Legend containing maths symbol and values of variables

[Daren Tan]

Thanks, that works beautifully. Without your help, I will be
struggling for a long time.

On Tue, Mar 24, 2009 at 7:46 PM, Gabor Grothendieck
<ggrothendieck at gmail.com> wrote:
> that should have been:
>
> L <- list(bquote("Up (" >= .(threshold) ~ ")"), "Normal", "Down", "NA")
> legend("top", leg = as.expression(L))
>
>
> On Tue, Mar 24, 2009 at 7:18 AM, Gabor Grothendieck
> <ggrothendieck at gmail.com> wrote:
>> Try this:
>>
>> L <- list(bquote("Up (" >= .(threshold) ~ ")"), "Normal", "Down", "NA")
>> legend("top", leg = L)
>>
>>
>> On Tue, Mar 24, 2009 at 2:52 AM, Daren Tan <darentan76 at gmail.com> wrote:
>>> 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")
>>>>>
>>>>> ______________________________________________
>>>>> 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.
>>>>>
>>>>
>>>
>>
>