[R] creating a plot legend

[Thomas Lumley]

On Mon, 24 Feb 2003, Jason Bond wrote:

> Thanks so much to all for their help.  I was wondering if there was an easy
> way to create legends in R plots.  For example, if I am plotting lines for
> subjects in a longitudinal design of the outcome by time for two different
> treatments, where the individual for treatment 1 are plotted in one color,
> and the others are plotted in another.  What I would like to do is, for
> example, have a little legend in the bottom right corner which puts the
> line color next to the treatment name.  I guess I could start messing with
> magins and try to draw text at given coordinates within the margin, but
> thought I might ask if anyone else has had success with a simpler
> solution.  Thanks so much again,
>

The legend() function.

As  a meta-answer I would also note that help.search("legend") would have
told you this.

	-thomas