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soiltexture (version 1.2.2)

Functions for soil texture plot, classification and transformation

Description

"The Soil Texture Wizard" is a set of R functions designed to produce texture triangles (also called texture plots, texture diagrams, texture ternary plots), classify and transform soil textures data. These functions virtually allows to plot any soil texture triangle / classification into any triangle geometry (isosceles, right-angled triangles, etc.). This set of function is expected to be useful to people using soil textures data from different soil texture classification or different particle size systems. Several texture triangles are predefined: USDA; FAO (which is also the triangle for the soil map of Europe); Aisne (France); GEPPA (France); German triangle (Bodenkundliche Kartieranleitung 1994); Soil Survey of England and Wales (UK); Australian triangle; Belgian triangle; Canadian triangle; ISSS triangle; Romanian traingle. The Soil Texture Wizard is initially develloped from the functions 'soil.texture()' from the package 'plotrix' by Jim Lemon et al.

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Version

Install

install.packages('soiltexture')

Monthly Downloads

930

Version

1.2.2

License

AGPL (>= 3)

Maintainer

Julien MOEYS

Last Published

April 1st, 2011

Functions in soiltexture (1.2.2)

TT.iwd

Inverse weighted distance interpolation on a grid.
TT.grid

Plot a grid at regular texture intervals inside an existing soil texture triangle.
TT.switch

Internal. Used in the plot axis drawings.
TT.ticks.lab

Internal. Plot the axis ticks' labels of a texture triangle plot.
TT.normalise.sum

Normalises the sum of the 3 particle size classes.
TT.str

Internal. Stretch or reshape the range of value of some data set.
TT.classes

Plot the texture classes polygons in a texture triangle plot.
TT.xy2css

Internal. Convert point-data duplets (2 variables, x-y coordinaes) in Clay silta and sand coordinates.
TT.mahalanobis

Calculates the Mahalanobis distance between clay silt and sand.
TT.kde2d

Calculated the 2D probabilty density on an x-y grid.
TT.vertices.tbl

Returns the table of vertices of a texture classification system.
TT.get

Function to retrieve / get the default package parameters.
TT.check.ps.lim

Internal. Check the consistency between 'base.ps.lim' and 'dat.ps.lim'.
TT.polygon.area

Determines the area of 1 polygon (in x-y coordinates).
TT.text

Plot text labels for each values of a soil texture data table on an existing texture plot.
TT.points.in.classes

Classify a table of soil texture data according to a soil texture triangle.
TT.env

TT env
TT.text.transf

Log-linear transformation of a soil texture data table between 2 particle size systems (3 classes).
TT.ticks

Internal. Plot the axis' ticks of a texture triangle plot.
TT.edges

Internal. Plot the edges (bare axis) of a soil texture triangle.
TT.col2hsv

Convert any colors to hsv.
TT.vertices.plot

Plot the vertices of a texture classification system.
TT.phi2dia

Convert a soil particle phi value into diameter dia [micro-meters].
soiltexture-package

Functions for soil texture plot, classification and transformation
TT.set

Function to change / set the default package parameters.
TT.text.transf.X

Log-linear transformation of a soil texture data table between 2 particle size systems (X classes).
TT.check.ps.lim.Xm

Internal. Check the consistency between 'base.ps.lim' and 'dat.ps.lim'.
TT.classes.tbl

Returns the table of classes of a texture classification system.
TT.ifelse

Internal. Flexible version of ifelse.
TT.blr.tx.check

Internal. Check the consistency between blr.tx and css.names.
TT.lines

Internal. Used to plot line elements of a texture plot axis, ticks, arrows, etc.
TT.gen.op.set

Internal. Retrieve and set default values from options.
TT.points

Plot a soil texture data table as points on an existing texture plot.
TT.data.test

Test the validity of some soil texture data table (3 particle size classes).
TT.baseplot

Internal. Create an empty plot scene for a texture triangle.
TT.data.test.X

Test the validity of some soil texture data table (X particle size classes).
TT.css2xy

Converts texture data (3 classes) into x-y coordinates.
TT.plot

Plot soil texture triangles / diagrams.
TT.dia2phi

Convert a soil particle diameter dia [micro-meters] into phi = -log2(dia/1000)
TT.text.transf.Xm

Transformations of a soil texture data table between 2 particle size systems (X classes), various methods.
TT.axis.arrows

Internal. Plot the axis' arrows of a texture triangle plot.
TT.par.op.set

Internal. Retrieve and set default values from options with default in "par()".
TT.xy.grid

Internal. Create a grid in the x-y coordinate system.
TT.add

Function to add a new default package parameters.
TT.contour

Wrapper for the contour() function adapted to texture triangles.
TT.geo.get

Internal. Retrieve and return the geometrical parameters from a list of parameter values (NULL or not).
TT.image

Wrapper for the contour() function adapted to texture triangles.
TT.locator

Interactive (mouse clic) retrieval the CLAY SILT SAND coordinate of points on a texture triangle.
TT.normalise.sum.X

Normalises the sum of the X particle size classes.
TT.chemometrics.alr

Compute the additive log-ratio transformation of compositional data.
TT.geo.set

Internal. Takes "geo" values and assign them individually in the parent function.
TT.dataset

Genetates a virtual cross correlated clay silt sand + Z dataset.
TT.blr.ps.lim

Internal. Create a tabular version of clay silt sand particle size limits.
TT.polygon.centroids

Determines the centroid of 1 polygon (in x-y coordinates).
TT.auto.set

Internal. Retrieve and set default values for parameters (par() or not), when NULL.
TT.DJ.col

A function to obtaine a weight average 'mix' of different colors!
TT.deg2rad

Function to convert angle in degree to angle in radian.