Look at the my.symbols function in the TeachingDemos package. You can get line segments using the ms.arrows function and setting the length argument to 0 (or you can make your own plotting function by copying ms.arrows and replacing the call to arrows with a call to segments).
Hope this helps, -- Gregory (Greg) L. Snow Ph.D. Statistical Data Center Intermountain Healthcare greg.s...@imail.org 801.408.8111 > -----Original Message----- > From: r-help-boun...@r-project.org [mailto:r-help-boun...@r- > project.org] On Behalf Of Tom_R > Sent: Friday, April 02, 2010 10:13 AM > To: r-help@r-project.org > Subject: [R] angles > > > Hi R users, > > I would like to construct a sort hybrid vector/scatter plot. > > My data is in the following format: 3-column x,y,z data-frame in which > every row is a separate data-point. > The x & y columns are coordinates, and the z column contains > orientation > data (range 0-180 degrees, with East=0 & North=90). > > I need to set each x,y, point to have the alignment in z. Hence my > 'vectors' > would simply be lines with the mid-point at x,y and without arrow- > heads. > > R's normal vector plot requires a pair of x,y coords for the start & > end of > each vector, whereas I just have an orientation. > > Any ideas? > > Cheers! > Tom > > -- > View this message in context: http://n4.nabble.com/angles- > tp1749321p1749321.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.
