with(p,plot(x,y,pch=20,col=1+as.integer(value)))

--
Clint Bowman                    INTERNET:       cl...@ecy.wa.gov
Air Quality Modeler             INTERNET:       cl...@math.utah.edu
Department of Ecology           VOICE:          (360) 407-6815
PO Box 47600                    FAX:            (360) 407-7534
Olympia, WA 98504-7600

On Fri, 20 Nov 2009, Senlin Liang wrote:

I have a file with 3 cols as:
x    y    value
1    1    0.5000
1    2    1.8333
1    3    4.3333
2    1    0.7500
2    2    0.7500
2    3    4
3    1    0.7500
3    2    1.4167
3    3    5.1667

I read them in using
p <- read.table("data.txt", header=TRUE)

My questoin: how to draw a image to show the values at different positions
(x, y)? I would like to see different colors for different values.

Sorry if it is a naive question, but it is my first week of R and I have
been trying for several hours trying to make it.

Thank you,


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