Hi one way is tu use arrows with code 3 and angle 90 the other is to use gplot or plotrix packages.
See http://wiki.r-project.org/rwiki/doku.php?id=tips:graphics-base:errbars Regards Petr [EMAIL PROTECTED] 724008364, 581252140, 581252257 [EMAIL PROTECTED] napsal dne 14.05.2008 23:04:16: > > hello: > > is there any graphic function under R that allow me to add an interval on > the graphic's picture at any place i want. > i mean by interval the symbol "|----|" showed verticaly and has as middle > the point M with coordinates (yi,ti).please answer me as soon as possible. > -- > View this message in context: http://www.nabble.com/is-there-any-graphic- > function-tp17240811p17240811.html > Sent from the R help mailing list archive at Nabble.com. > > ______________________________________________ > 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.