On Wed, Nov 06, 2002 at 10:22:05AM +0100, Christian Hoffmann wrote:> Hi all, > > May be there is a plot which shows 3 variables in a triangle, their sum > being constant. I have forgotten its name, and a search in the engine using > "plot" did not help. > > Does anyone know of such a procedure in R or S?ternary plots. http://finzi.psych.upenn.edu/R/Rhelp01/archive/1000.html Cheers Jason -- Indigo Industrial Controls Ltd. 64-21-343-545 jasont at indigoindustrial.co.nz -.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.- r-help mailing list -- Read http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html Send "info", "help", or "[un]subscribe" (in the "body", not the subject !) To: r-help-request at stat.math.ethz.ch _._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._
Hi all, May be there is a plot which shows 3 variables in a triangle, their sum being constant. I have forgotten its name, and a search in the engine using "plot" did not help. Does anyone know of such a procedure in R or S? Thank you --christian Dr.sc.math.Christian W. Hoffmann Mathematics and Statistical Computing Landscape Dynamics and Spatial Development Swiss Federal Research Institute WSL Zuercherstrasse 111 CH-8903 Birmensdorf, Switzerland phone: ++41-1-739 22 77 fax: ++41-1-739 22 15 e-mail: christian.hoffmann at wsl.ch www: http://www.wsl.ch/staff/christian.hoffmann/ -.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.- r-help mailing list -- Read http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html Send "info", "help", or "[un]subscribe" (in the "body", not the subject !) To: r-help-request at stat.math.ethz.ch _._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._
A ternary plot. library(MASS) ?Skye will give you code and an example. On Wed, 6 Nov 2002, Christian Hoffmann wrote:> Hi all, > > May be there is a plot which shows 3 variables in a triangle, their sum > being constant. I have forgotten its name, and a search in the engine using > "plot" did not help.-- Brian D. Ripley, ripley at stats.ox.ac.uk Professor of Applied Statistics, http://www.stats.ox.ac.uk/~ripley/ University of Oxford, Tel: +44 1865 272861 (self) 1 South Parks Road, +44 1865 272860 (secr) Oxford OX1 3TG, UK Fax: +44 1865 272595 -.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.- r-help mailing list -- Read http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html Send "info", "help", or "[un]subscribe" (in the "body", not the subject !) To: r-help-request at stat.math.ethz.ch _._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._
They're called "ternary plots" http://maths.newcastle.edu.au/~rking/R/help/01a/0954.html http://maths.newcastle.edu.au/~rking/R/help/01a/1355.html http://maths.newcastle.edu.au/~rking/R/help/01a/0971.html http://finzi.psych.upenn.edu/R/Rhelp01/archive/6206.html etc. On Wed, 6 Nov 2002, Christian Hoffmann wrote:> Hi all, > > May be there is a plot which shows 3 variables in a triangle, their sum > being constant. I have forgotten its name, and a search in the engine using > "plot" did not help. > > Does anyone know of such a procedure in R or S? > > Thank you > --christian > > Dr.sc.math.Christian W. Hoffmann > Mathematics and Statistical Computing > Landscape Dynamics and Spatial Development > Swiss Federal Research Institute WSL > Zuercherstrasse 111 > CH-8903 Birmensdorf, Switzerland > phone: ++41-1-739 22 77 fax: ++41-1-739 22 15 > e-mail: christian.hoffmann at wsl.ch > www: http://www.wsl.ch/staff/christian.hoffmann/ > > -.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.- > r-help mailing list -- Read http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html > Send "info", "help", or "[un]subscribe" > (in the "body", not the subject !) To: r-help-request at stat.math.ethz.ch > _._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._ >-- 318 Carr Hall bolker at zoo.ufl.edu Zoology Department, University of Florida http://www.zoo.ufl.edu/bolker Box 118525 (ph) 352-392-5697 Gainesville, FL 32611-8525 (fax) 352-392-3704 -.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.- r-help mailing list -- Read http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html Send "info", "help", or "[un]subscribe" (in the "body", not the subject !) To: r-help-request at stat.math.ethz.ch _._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._
>>>>> "christian" == Christian Hoffmann <christian.hoffmann at wsl.ch> writes:christian> May be there is a plot which shows 3 variables in a christian> triangle, their sum being constant. I have forgotten christian> its name, and a search in the engine using "plot" did christian> not help. trilinear plot is one term. christian> Does anyone know of such a procedure in R or S? I don't know. best, -tony -- A.J. Rossini Rsrch. Asst. Prof. of Biostatistics U. of Washington Biostatistics rossini at u.washington.edu FHCRC/SCHARP/HIV Vaccine Trials Net rossini at scharp.org -------------- http://software.biostat.washington.edu/ ---------------- FHCRC: M: 206-667-7025 (fax=4812)|Voicemail is pretty sketchy/use Email UW: Th: 206-543-1044 (fax=3286)|Change last 4 digits of phone to FAX (my tuesday/wednesday/friday locations are completely unpredictable.) -.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.- r-help mailing list -- Read http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html Send "info", "help", or "[un]subscribe" (in the "body", not the subject !) To: r-help-request at stat.math.ethz.ch _._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._
Some time ago I coppied following script for plotting ternary
graphs
#----------------------------------------------------------------------------
-----
#
# Colin Farrow
# Computing Service, University of Glasgow, Glasgow G12 8QQ
# c.farrow at compserv.gla.ac.uk
tri<-
function(a, f, m, symb = 2, grid = F, ...)
{
ta <- paste(substitute(a))
tf <- paste(substitute(f))
tm <- paste(substitute(m))
tot <- 100/(a + f +m)
b <- f * tot
y <- b * .878
x <- m * tot + b/2
par(pty = "s")
oldcol <- par("col")
plot(x, y, axes = F, xlab = "", ylab = "", xlim = c(-10,
110), ylim
= c(-10, 110), type = "n", ...)
points(x,y,pch=symb)
par(col = oldcol)
trigrid(grid)
text(-5, -5, ta)
text(105, -5, tm)
text(50, 93, tf)
par(pty = "m")
invisible()
}
"trigrid"<-
function(grid = F)
{
lines(c(0, 50, 100, 0), c(0, 87.8, 0, 0)) #draw frame
if(!grid) {
for(i in 1:4 * 20) {
lines(c(i, i - 1), c(0, 2 * .878)) #side a-c (base)
lines(c(i, i + 1), c(0, 2 * .878))
T.j <- i/2 #side a-b (left)
lines(c(T.j, T.j + 2), c(i * .878, i * .878))
lines(c(T.j, T.j + 1), c(i * .878, (i - 2) * .878))
T.j <- 100 - i/2 #side b-c (right)
lines(c(T.j, T.j - 2), c(i * .878, i * .878))
lines(c(T.j, T.j - 1), c(i * .878, (i - 2) * .878))
}
}
else {
for(i in 1:4 * 20) {
# draw dotted grid
lines(c(i, i/2), c(0, i * .878), lty = 4, col = 3) #
lines(c(i, (50 + i/2)), c(0, .878 * (100 - i)), lty = 4,
col = 3) # /
lines(c(i/2, (100 - i/2)), c(i * .878, i * .878), lty
= 4, col = 3) # -
}
par(lty = 1, col = 1)
}
}
On 6 Nov 2002 at 10:22, Christian Hoffmann wrote:
> Hi all,
>
> May be there is a plot which shows 3 variables in a triangle, their
> sum being constant. I have forgotten its name, and a search in the
> engine using "plot" did not help.
>
> Does anyone know of such a procedure in R or S?
>
> Thank you
> --christian
>
> Dr.sc.math.Christian W. Hoffmann
> Mathematics and Statistical Computing
> Landscape Dynamics and Spatial Development
> Swiss Federal Research Institute WSL
> Zuercherstrasse 111
> CH-8903 Birmensdorf, Switzerland
> phone: ++41-1-739 22 77 fax: ++41-1-739 22 15
> e-mail: christian.hoffmann at wsl.ch
> www: http://www.wsl.ch/staff/christian.hoffmann/
>
> -.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.
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Petr Pikal
petr.pikal at precheza.cz
p.pik at volny.cz
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