[R] Conditional plots in the soiltexture package

[Julien Moeys]

Dear Alessandro

I am not sure what you mean by "conditional plot"

But if it is about having a different symbol, for different soil parent materials, you can use the pch argument in TT.plot()

#######
require( soiltexture ) 

# :: 1st create a dummy texture dataset 
my.text <- data.frame( 
    "CLAY"  = c(05,60,15,05,25,05,25,45,65,75,13,47), 
    "SILT"  = c(05,08,15,25,55,85,65,45,15,15,17,43), 
    "SAND"  = c(90,32,70,70,20,10,10,10,20,10,70,10), 
    "parent"= rep(1:2,each=6) # parent material and symbol code
)   #
dim( my.text ) 

TT.plot( tri.data = my.text, pch = my.text[,"parent"] )
#######

Is that what you need?
 
All the best

Julien


________________________________________
From: r-help-bounces at r-project.org [r-help-bounces at r-project.org] On Behalf Of samuel-rosa [alessandrosamuel at yahoo.com.br]
Sent: 30 August 2011 03:48
To: r-help at r-project.org
Subject: [R] Conditional plots in the soiltexture package

Dear R users

I'd like to know if it is possible to create conditional plots in the
soiltexture package. I have data from the particle size distribution of
soils derived from two parent materials and I want to use the parent
material as conditioner.

Thanks a lot.

Alessandro Samuel-Rosa
Post-Graduation Program in Soil Science
Federal University of Santa Maria
Av. Roraima, nº 1000, CEP 97105-970
Santa Maria, RS, Brazil

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