Peter's way is better than mine. Bert Gunter Genentech Nonclinical Biostatistics
-----Original Message----- From: r-help-boun...@r-project.org [mailto:r-help-boun...@r-project.org] On Behalf Of Peter Dalgaard Sent: Monday, January 25, 2010 12:57 PM To: Larry Hotchkiss Cc: r-help@r-project.org Subject: Re: [R] Two == expressions in bquote Larry Hotchkiss wrote: > Hi, > > I want to put text on a plot containing something like: a = b^2 = <squared numeric value of b> using bquote. > > Example: > > mu = 5 > plot(1:10,1:10) > text(2,8, bquote(delta == mu^2)) # This works > text(2.5,8, bquote(phantom(0) == .(mu^2))) # but is unpredictable > > text(2,8, bquote(delta == mu^2 == .(mu^2))) # This doesn't work > > The last text function returns the error: > > Error: unexpected '==' in " text(2,8, bquote(delta == mu^2 ==" The comparison operators are not associative (they once were, but people were getting surprises from 3 > 2 > 1 evaluating to TRUE > 1 evaluating to FALSE). A set of suitably placed braces should clear things up: text(2,8,bquote(delta == {mu^2 == .(mu^2)})) > The first two text functions work in this example, using a default graphics window on a 64-bit Windows machine, and either R 2.11.0 development edition for 64-bit Windows or R 9.2.2 on the same machine ((x 86)). > > I don't mind the two statements except that when trying to automate this by using the base x coordinate + epsilon*max(x), for example -- > > x <- 1:10 > epsilon=0.05 > text(2+esilon*max(x),8, bquote(phantom(0) == .(mu^2))) > > for the x position on the 2nd text function, the position of the additional text is not predictable. > > Thanks, > > Larry Hotchkiss > > ______________________________________________ > 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. -- O__ ---- Peter Dalgaard Øster Farimagsgade 5, Entr.B c/ /'_ --- Dept. of Biostatistics PO Box 2099, 1014 Cph. K (*) \(*) -- University of Copenhagen Denmark Ph: (+45) 35327918 ~~~~~~~~~~ - (p.dalga...@biostat.ku.dk) FAX: (+45) 35327907 ______________________________________________ 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.
