To left justify the text rather than center, use the adj argument, this is easier and probably more reliable than trying to adjust the x coordinate manually.
-- Gregory (Greg) L. Snow Ph.D. Statistical Data Center Intermountain Healthcare [EMAIL PROTECTED] (801) 408-8111 > -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] On Behalf Of Nordlund, > Dan (DSHS/RDA) > Sent: Wednesday, March 12, 2008 12:26 PM > To: Alberto Monteiro; Tom La Bone; r-help@r-project.org > Subject: Re: [R] Specifying relative position of text in a plot > > > -----Original Message----- > > From: [EMAIL PROTECTED] > > [mailto:[EMAIL PROTECTED] On Behalf Of Alberto Monteiro > > Sent: Wednesday, March 12, 2008 10:28 AM > > To: Tom La Bone; r-help@r-project.org > > Subject: Re: [R] Specifying relative position of text in a plot > > > > > > Tom La Bone asked: > > > > > > What is the simplest way to specify the location of text in a > > > scatter plot (created using the plot function) in relative terms > > > rather than specific x-y coordinates? For example, rather than > > > putting text at > > > (300,49) on a plot, how do I put it 1/10 of the way over > from the y > > > axis and 1/2 of the way up from the x axis? Thanks. > > > > > See the help of par: > > ?par > > > > Namely: > > > > plot(rnorm(100), rnorm(100)) > > pu <- par()$usr > > x <- pu[1] * 0.5 + pu[2] * 0.5 > > y <- pu[3] * 0.1 + pu[4] * 0.9 > > text(x, y, "the quick brown fox jumps over a lazy dog") > > > > Alberto Monteiro > > > > This is a useful example of placing text, but I interpreted > the request as aking for the text to be placed at the left > side of the graph (1/10 of the x range) and centered > vertically (with respect to the y scale). So, then I would > calculate x and y as > > x <- pu[1] * 0.9 + pu[2] * 0.1 > y <- pu[3] * 0.5 + pu[4] * 0.5 > > Also, text() centers the supplied text at the x,y > coordinates. So, if Tom wants the text "begin" at that point, > he will need to adjust the x coordinate for the length of the > string being printed. > > Hope this is helpful, > > Dan > > Daniel J. Nordlund > Research and Data Analysis > Washington State Department of Social and Health Services > Olympia, WA 98504-5204 > > > > ______________________________________________ > R-help@r-project.org mailing list > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide > http://www.R-project.org/posting-guide.html > and provide commented, minimal, self-contained, reproducible code. > ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
