specify size of box around legend

Duncan Murdoch <murdoch.duncan at gmail.com> writes:

On 11/03/2016 9:01 AM, Rainer M Krug wrote:

Hi

assume the following code:

--8<---------------cut here---------------start------------->8---
plot(1,1)
legend(x="topleft", legend = LETTERS[1:10], title = "L 1")
legend(x="bottomleft", legend = paste(LETTERS[1:10], letters[1:12],LETTERS[1:10]), title = "L 2")
legend(x="topright", legend = LETTERS[1:15], title = "L 3")
--8<---------------cut here---------------end--------------->8---

The box around L 1 is less wide than the box around L 2 due to automatic
sizing of the box.

Is there a way of specifying the width of the box, so that L 1 and L 2
have the same width?

text.width should work.  (It is in the ?legend help page, along with
approximately one million other optional arguments.)

Thanks - that works.

May I suggest to change the documentation from:

--8<---------------cut here---------------start------------->8---
text.width: the width of the legend text in x (?"user"?) coordinates.
           (Should be positive even for a reversed x axis.)  Defaults to
           the proper value computed by ?strwidth(legend)?.
--8<---------------cut here---------------end--------------->8---

to

--8<---------------cut here---------------start------------->8---
text.width: the width of the legend text in x (?"user"?) coordinates.
           (Should be positive even for a reversed x axis.)  If set,
          it is used to compute the width of the legend box. Defaults to
           the proper value computed by ?strwidth(legend)?.
--8<---------------cut here---------------end--------------->8---

to make this clear?

In the same sense: can I also specify the height of the legend, so that
L 1 and L 3 have the same height?

You can add blank entries as fillers to L 1.

True - but no other parameter to achieve this? Equivalent to text.widht?