Re: [R] Specifying relative position of text in a plot

From: Tom La Bone <booboo_at_gforcecable.com>
Date: Thu, 13 Mar 2008 03:46:30 -0700 (PDT)

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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