Hi all, Can anyone point me to a function for plotting a ternary diagram (a triangular plot; typically, each axis ranges 0-100% with cumulative value for each point adding to 100% along all three axes)? It's frequently used by geologists to plot sedimentological or mineralogical composition, and I think I've seen it used in biome mapping (temperature/elevation/moisture). A bit further afield, do any functions exist to extend this to 4 axes, as a pyramidal quarternary diagram? Thanks for any advice, Phil ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Phil Novack-Gottshall pnovackg at westga.edu Assistant Professor Department of Geosciences University of West Georgia Carrollton, GA 30118-3100 Phone: 678-839-4061 Fax: 678-839-4071 http://www.westga.edu/~pnovackg ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Plotting ternary diagrams
4 messages · Phil Novack-Gottshall, Sarah Goslee, Gavin Simpson +1 more
ternaryplot in package vcd will do it. See also http://tolstoy.newcastle.edu.au/R/help/05/05/5421.html and the rest of the thread. Sarah On Thu, Jun 19, 2008 at 11:56 AM, Phil Novack-Gottshall
<pnovackg at westga.edu> wrote:
Hi all, Can anyone point me to a function for plotting a ternary diagram (a triangular plot; typically, each axis ranges 0-100% with cumulative value for each point adding to 100% along all three axes)? It's frequently used by geologists to plot sedimentological or mineralogical composition, and I think I've seen it used in biome mapping (temperature/elevation/moisture). A bit further afield, do any functions exist to extend this to 4 axes, as a pyramidal quarternary diagram? Thanks for any advice, Phil
Sarah Goslee http://www.functionaldiversity.org
On Thu, 2008-06-19 at 11:56 -0400, Phil Novack-Gottshall wrote:
Hi all, Can anyone point me to a function for plotting a ternary diagram (a triangular plot; typically, each axis ranges 0-100% with cumulative value for each point adding to 100% along all three axes)? It's frequently used by geologists to plot sedimentological or mineralogical composition, and I think I've seen it used in biome mapping (temperature/elevation/moisture).
RSiteSearch("ternary", restrict = "functions")
And take a look at some of the hits from there.
HTH
G
A bit further afield, do any functions exist to extend this to 4 axes, as a pyramidal quarternary diagram? Thanks for any advice, Phil
%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~% Dr. Gavin Simpson [t] +44 (0)20 7679 0522 ECRC, UCL Geography, [f] +44 (0)20 7679 0565 Pearson Building, [e] gavin.simpsonATNOSPAMucl.ac.uk Gower Street, London [w] http://www.ucl.ac.uk/~ucfagls/ UK. WC1E 6BT. [w] http://www.freshwaters.org.uk %~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%
See also the "soil texture plot" and "ternary plot" in the R Graph Gallery. You can find source code for each of them there. http://addictedtor.free.fr/graphiques/RGraphGallery.php?graph=76 http://addictedtor.free.fr/graphiques/RGraphGallery.php?graph=34 cheers, Mike
Phil Novack-Gottshall wrote:
Hi all, Can anyone point me to a function for plotting a ternary diagram (a triangular plot; typically, each axis ranges 0-100% with cumulative value for each point adding to 100% along all three axes)? It's frequently used by geologists to plot sedimentological or mineralogical composition, and I think I've seen it used in biome mapping (temperature/elevation/moisture). A bit further afield, do any functions exist to extend this to 4 axes, as a pyramidal quarternary diagram? Thanks for any advice, Phil ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Phil Novack-Gottshall pnovackg at westga.edu Assistant Professor Department of Geosciences University of West Georgia Carrollton, GA 30118-3100 Phone: 678-839-4061 Fax: 678-839-4071 http://www.westga.edu/~pnovackg ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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