Forum: help

RE: Welcome to Help [ Reply ] By: Roberto Barbetti on 2010-10-05 14:30	[forum:3443]
Well! done...

RE: Welcome to Help [ Reply ] By: Julien Moeys on 2010-10-05 14:11	[forum:3442]
Hi Roberto I think you are not using the latest version of "soiltexture" (it works on my PC, but not with an old version) install the lastet one from CRAN or r-forge The possibility to pass a vector of colors to class.p.bg.col was only added recently... Julien

RE: Welcome to Help [ Reply ] By: Roberto Barbetti on 2010-10-05 13:51	[forum:3441]
yes this is the question... but last statement give me an error: Error in (class.sys != "none") & class.p.bg.col :operations are possible only for numeric, logical or complex types thanks for your help

RE: Welcome to Help [ Reply ]
By: Julien Moeys on 2010-09-30 14:38

[forum:3425]

I Roberto

Not yet 100% sure I understood what you want, but most probably it is this kind of thing:

# Create a dummy data frame of soil textures:
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),
"OC" = c(20,14,15,05,12,15,07,21,25,30,05,28)
) #

# Display the table:
my.text

# Lets say you are only interested in
# points 4 and 5

# Classify according to the FAO classification
classif <- TT.points.in.classes(
tri.data = my.text[4:5,],
class.sys = "USDA.TT"
) #

# Retreive the list of classes concerned
u.classif <- unique( unlist( apply( classif, 1, function(X){names(X)[X != 0]} ) ) )

# Create a vector of colors for each
# possible texture classes:
my.col <- rep(gray(0.9),ncol(classif))

# Change the colors of the textuer
# classes concerned:
my.col[ colnames(classif) %in% u.classif ] <- gray(0.5)

# Plot the triangle with these new
# classes colors
TT.plot(
class.sys = "USDA.TT",
class.p.bg.col = my.col,
cex.lab= 1,
cex.axis=1,
grid.col=gray(0.8)
) #

## grid.col is Normally not needed but
## there is a little bug
## in the code giving strange results
## otherwise! (to be corrected)

Is that what you need? (there is no build in function for that purpose, but the script probably works)

RE: Welcome to Help [ Reply ] By: Roberto Barbetti on 2010-09-30 12:49	[forum:3424]
this one: to plot some texture data in a texture triangle... I work with range and not with points. I'd like to produce a STU reports with selected (coloured) polygon of soiltexture. for example the texture of XXX STU may be SiLo or Si thanks a lot

RE: Welcome to Help [ Reply ] By: Julien Moeys on 2010-09-30 11:22	[forum:3423]
Hi Robeto I am not sure I understand your question. Do you want: - customise a soiltexture plot (without data)? - to plot some texture data in a texture triangle? - to classify some texture data according to a triangle? - to retrieve the clay-silt-sand coordinates of the boundaries of some texture classes? with best Julien

RE: Welcome to Help [ Reply ] By: Roberto Barbetti on 2010-09-30 08:48	[forum:3422]
Sorry...If I have an interval soil texure ie (SiLo and Si class ). how can I access the textural triangle polygons? I star with: TT.plot( class.sys = "USDA.TT",cex.lab= 1,cex.axis=1) and then?

Welcome to Help [ Reply ] By: Stefan Theussl on 2010-04-08 18:35	[forum:2723]
Welcome to Help