[R] Specifying relative position of text in a plot

Tom La Bone booboo at gforcecable.com
Thu Mar 13 11:46:30 CET 2008


Thanks for all of the suggestions. The key key here seems to be using the
"par" function to change the coordinate system like so 

plot(rnorm(100), rnorm(100))
op <- par("usr")
par(usr = c(0, 1, 0, 1))
text(0.5,0.5,"TEST")
par(usr = op)

Prof Ripley commented that this approach will also work on log plots, but I
don't think I completely understand what is going on because this does not
work for me

plot(rlnorm(100), rlnorm(100),log="xy")
op <- par("usr")
par(usr = c(0, 1, 0, 1))
text(0.5,0.5,"TEST")
par(usr = op)

Any hints on what I am doing wrong with the log plots? Thanks again for the
help.

Tom


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