[R] Add coordinates at specific points...

David Winsemius
Wed, 13 Jul 2011 20:41:35 -0000

On Jul 13, 2011, at 1:22 PM, JIA Pei wrote:

> Hi, all:
>
> I used two lines of very simple code to draw a sin curve.
>
> dev.new(width = 640, height = 480)
>> plot(sin, -pi, 2*pi)

First look at:

?mtext   # then try
mtext(text="2.5000", side = 1, line = 1,  at =
2.5)
>
>
> Now, I added a specific line (red line in the picture at
> http://www.visionopen.com/Rplot.png) by using abline.
> However, I still love to add the X-coordinate "2.50000" outside
the
> rectangle box. How to do it in R?
> Right now, I'm using Windows Paint to add the characters
"2.50000"
> up to the
> plot drawn by R.


--
David Winsemius, MD
West Hartford, CT