There are also the functions: triangle.plot in package ade4, triplot in package TeachingDemos, tri in package cwhtool, and soil.texture in package plotrix. Perhaps one of these other functions will work better for you (all do the triangular plots, each with different bells and whistles).
triplot from TeachingDemos has an option to add to an existing plot (the idea being that you already created one triplot and are now adding more points/lines to it). You could set up your own plot and axes then use triplot with add=TRUE to plot your points. If none of those work for you then you could look at the source code of any of them to see what modifications would help. Hope this helps, -- 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 Poizot Emmanuel Sent: Thursday, May 18, 2006 7:05 AM To: r-help@stat.math.ethz.ch Subject: [R] Negative value on ternaryplot Dear all, I found a wonderful package (vcd) able to plot ternary diagrams, i.e. ternaryplot (thanks D. Meyer). The problem is that one of three variable has negative values. If I use the ternaryplot function but some points are outside the triangle, as value en negative. Is it possible to make the ternary diagram fit exactly the cloud points ? Regards ------------------------------------------------ Emmanuel Poizot Cnam/Intechmer B.P. 324 50103 Cherbourg Cedex Phone (Direct) : (00 33)(0)233887342 Fax : (00 33)(0)233887339 ______________________________________________ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
