[R] using a variable and a superscript in a legend

[Patrick Giraudoux]

Thanks Bert and Peter,

Yes Bert, I was aware of the legend() function syntax, and just quoting 
the legend argument within the function.

However, Bert and Peter, I do not understand why it works with your 
absolutely reproducible examples and not in the slightly (not so 
slightly apparently) different context where I used it...

densren=1.25
plot(1:100,1:100,type="n")
legend(list(x=0,y=100),legend=c("Sans renard",bquote(.(densren) 
(ind./km)^2)),lty=c(1,2),col=c("black","red"),bty="n")

densren=1.25
plot(1:100,1:100,type="n")
legend(list(x=0,y=100),legend=c("Sans renard",bquote(.(densren) * " 
ind."/"km"^2)),lty=c(1,2),col=c("black","red"),bty="n"

Probably because the result of bquote() is concatenated in a character 
vector, but how to deal with this ?

Best,

Patrick



Le 20/10/2019 à 16:42, Bert Gunter a écrit :
> Assuming you are using base graphics, your syntax for adding the 
> legend appears to be wrong.
> legend() is a separate function, not a parameter of plot.default afaics.
>
> The following works for me:
>
> > densren <- 1.25
> > plot(1:10)
> > legend (x="center", legend =bquote(.(densren) (ind./km)^2))
>
> See ?legend
>
> Bert Gunter
>
> "The trouble with having an open mind is that people keep coming along 
> and sticking things into it."
> -- Opus (aka Berkeley Breathed in his "Bloom County" comic strip )
>
>
> On Sun, Oct 20, 2019 at 5:30 AM Patrick Giraudoux 
> <patrick.giraudoux using univ-fcomte.fr 
> <mailto:patrick.giraudoux using univ-fcomte.fr>> wrote:
>
>     Dear listers,
>
>     I am trying to pass an expression inlcuding a variable and a
>     superpscript to a legend. What I want to obtain is e.g. with
>     densren = 1.25
>
>     1.25 ind./km^2
>
>     I have tried many variants of the following:
>
>     legend=bquote(.(densren) (ind./km)^2)
>
>     but if not errors, do obtain
>
>     1.25 (ind./km^2)
>
>     hence not what I want (no parenthesis, 2 in superscript...)
>
>     Any idea about a correct syntax to get what I need ?
>
>     Best,
>
>     Patrick
>
>
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