Poizot Emmanuel wrote: > 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 > Hi Emmanuel,
As Christos has already pointed out, triangle/ternary plots are intended to display triplets of values that add up to a constant. Negative numbers stretch the definition a bit. One could take triax.plot from plotrix and rejig the code to have the axes running from -0.5 to 1.5. This might appear to work, but the interpretation of such a plot would be difficult at best. Perhaps you want a 3D plot of some type like scatterplot3D? Jim ______________________________________________ [email protected] mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
