Re: [R] distance between legend title and legend box

From: Paul Murrell <p.murrell_at_auckland.ac.nz>
Date: Thu 26 Oct 2006 - 19:18:03 GMT

Hi

Denis Chabot wrote:
> Hi,
>
> I've looked at the parameters available for the legend function and
> cannot find a way to change the distance between the top of the box
> surrounding a legend and the legend's title. I have a math expression
> that raises the height of my title.
>
> If you don't mind the non-sensical title I give to the legend for
> this plot (Figure 3.20 in R Graphics):
>
> with(iris,
> plot(Sepal.Length, Sepal.Width,
> pch=as.numeric(Species), cex=1.2))
> legend(6.5, 4.2, c("setosa", "versicolor", "virginica"),
> cex=1, pch=1:3, title=expression("kg/km"^2))
>
> The result depends on the device, but I think any device will show
> the box needs to be raised a bit (in quartz, the top of the box
> passes in the middle of the "2", in pdf it is acceptable, but just
> (the top of the box lightly touches the top of the "2").

Looking at the source for legend(), it only expects the title to be zero or 1 "lines" high (i.e., either no title or a title that is one line of normal text high). It needs a rewrite to allow for the exact height of the title text.

Paul

> Sincerely,
>
> Denis Chabot
>
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-- 
Dr Paul Murrell
Department of Statistics
The University of Auckland
Private Bag 92019
Auckland
New Zealand
64 9 3737599 x85392
paul@stat.auckland.ac.nz
http://www.stat.auckland.ac.nz/~paul/

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Received on Fri Oct 27 05:25:00 2006

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