On Jul 13, 2011, at 7:59 PM, JIA Pei wrote:
Thanks David, for your prompt reply.
Ok... just avoid this mess.
I'd love to emphasize the key point M(2.1, sin(2.1)), and just write
a point coordinate by the side of M .How to do that easily?
Have you worked through the examples on the help(text) page? This does
not seem to be that difficult. Three essential arguments.... x,y and
text. You are supposed to put for effort and show what code you have
tried.
text(2.1, sin(2.1), labels="M=(2.1, sin(2.1) )")
You can play around with the positioning arguments, which IIRC are
adj= and <something else>.
By the way, if there is another point N(2.2, sin(2.2)), will M and N
conflict (overlap) each other?
I don't see how that could be avoided. (Last color wins.) We don't
have 3d glasses for our screens yet. Transparenct colors are
available, but you don't seem to be ready for that yet.
Cheers
Pei
On Wed, Jul 13, 2011 at 4:49 PM, David Winsemius <dwinsem...@comcast.net
> wrote:
On Jul 13, 2011, at 7:42 PM, JIA Pei wrote:
Hi, Thanks David Winsemius:
"mtext" works !! However, in R plot, "mtext" will automatically
overlap/overwrite the existing coordinates, which makes the
coordinates a messy.
Refer to http://www.visionopen.com/Rplot.png , which is produced by
only 3 lines.
dev.new(width = 640, height = 480)
plot(sin, -pi, 2*pi)
mtext(text="2.1000", side = 1, line = 1, at = 2.1)
In order to avoid the coordinates overlap, can I change the position
of "2.1000" from outside the box to inside the box? If possible, how
to?
I tried “outer = FALSE,” nothing special happened ever !!
You should use text() rather than mtext() if you are going to plot
within the "user area".
cheers
Pei
On Wed, Jul 13, 2011 at 1:41 PM, David Winsemius <dwinsem...@comcast.net
> wrote:
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
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