-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 On 15-02-10 08:55 AM, David L Carlson wrote: > Thanks, I didn't know about corner.label. I started with legend but > I couldn't find a way to make the box small enough. It always > covered much more of the corner than the letter which could have > obscured data points. > > David >
Not sure, but setting the background to NA (bg=NA) might? help. > -----Original Message----- From: R-help > [mailto:r-help-boun...@r-project.org] On Behalf Of Ben Bolker > Sent: Monday, February 9, 2015 5:43 PM To: r-h...@stat.math.ethz.ch > Subject: Re: [R] Coordinate or top left corner + offset > > David L Carlson <dcarlson <at> tamu.edu> writes: > >> >> This is more complicated, but it could be rolled up into a >> function. > Replace your mtext() call with the following: >> >> # Set character expansion size cx <- 2.5 # Get the plot >> coordinates and the character size ur <- par("usr")[c(1, 4)] chr >> <- par("cxy") rect(ur[1]+chr[1]/10, ur[2]-chr[2]*cx, >> ur[1]+chr[1]*cx, ur[2]-chr[1]/10, border=NA, col="white") >> text(ur[1]+chr[1]*cx/2, ur[2]-chr[2]*cx/2, "a", font=2, cex=2.5, >> col="red") >> >> 1) Assign to cx the cex= value that you are using in text(). 2) >> Then get the upper right corner of the plot window and the size >> of the > default character width in user >> coordinate units. 3) Draw a white rectangle the size of the >> character you are plotting (in > this case cex=2.5). Shrink the left >> and top edge so that the box around the plot area is not >> obscured. 4) Plot your character in the center of the box. >> > > There are two more tricks you can use here: > > (1) cheat by using legend() > > plot(0:10,0:10) legend("topleft",legend=NA,title="hello",bty="n") > > (2) use plotrix::corner.label > > ___________________________________ -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.11 (GNU/Linux) iQEcBAEBAgAGBQJU2iroAAoJEOCV5YRblxUHV/YIAMn8cmOdQv035AUCYJCPgMl6 DDPztxTUIEsynQWPxyz2f853GnycIrsIkRDwWWKWaiGjsjeYEK2yb3kDpgLMyIca JusoldnnIXGSwod2Hx8ozJFx2ggTDDyuP7uTkKWlXBTyM90XxVlZvEf8ZrbMSbly dni6JMLdlUEBaYWvOV8dLuCYBFO1Mv5VXitY3YpoLGM5h3WIEK/6ABTVFBFXI9VH Hujb1R7680mfY4V0jGmeY2vTdiIGZH6MGkOdLXNZhBwS1zjkBnoPJ6p6UMNVHbt0 DAgiNrfY+asG/NPEVgvvqeLpJ3TJ4xdt22o2ScG2vcbP0Qg6asrfnxqgrUc3vxM= =94Ln -----END PGP SIGNATURE----- ______________________________________________ R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see 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.
