[R] contour on a simplex

[David Winsemius]

If Dennis' interpretation of your request is correct then Harrell rms/ 
Hmisc packages provide a mechanism for restricting plotting of  
contours to the region within a perimeter. He has a perimeter function  
and the bplot function takes a perim argument. The reason I did not  
offer it earlier is two fold: a) no test code offered and b) that I  
thought you wanted contours projected on a somewhat more complex 3D  
surface, i.e. a tilted plane. I have seen Sarkar illustrate  
projections of contours on one of the sides of a "box". See Figure  
13.7 at:

http://lmdvr.r-forge.r-project.org/figures/figures.html

It does appear that his panel.3d.contour on that page may offer the  
tools for construction of your objective.

Also:
?panel.cloud  # which has documentation for panel.3dwire

-- 
David




On Oct 22, 2010, at 11:18 PM, Dennis Murphy wrote:

> Hi:
>
> Check out this post on R-help from February, and look carefully at the
> solution of Walmes Zeviani - I believe it's close to what you're  
> requesting:
>
> http://r.789695.n4.nabble.com/Triangular-filled-contour-plot-td1557386.html
>
> HTH,
> Dennis
>
> On Fri, Oct 22, 2010 at 6:15 PM, Yunting Sun <yunting.sun at gmail.com>  
> wrote:
>
>> Hello,
>>
>> anyone knows if there is a way in R to draw contour on a simplex  
>> based on a
>> function f(x,y,z)  with domain (x+y+z = 1)?
>>
>> Thank you!
>>
>> gigi
>>
>>       [[alternative HTML version deleted]]
>>
>> ______________________________________________
>> R-help at 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.
>>
>
> 	[[alternative HTML version deleted]]
>
> ______________________________________________
> R-help at 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.