Learn R Programming
⚠️There's a newer version (1.5.3) of this package.Take me there.

soiltexture (version 1.01)

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.

Copy Link

Version

Install

install.packages('soiltexture')

Monthly Downloads

930

Version

1.01

License

GPL (>= 3)

Maintainer

Julien MOEYS

Last Published

September 2nd, 2010

Functions in soiltexture (1.01)

TT.contour

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

Internal. Create an empty plot scene for a texture triangle.
TT.DJ.col

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

Plot the texture classes polygons in a texture triangle plot.
TT.deg2rad

Function to convert angle in degree to angle in radian.
TT.dia2phi

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

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

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

Internal. Used to plot line elements of a texture plot axis, ticks, arrows, etc.
TT.data.test

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

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

Wrapper for the contour() function adapted to texture triangles.
TT.col2hsv

Convert any colors to hsv.
TT.text.transf.Xm

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

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

Plot a soil texture data table as points on an existing texture plot.
TT.par.op.set

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

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

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

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

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

Genetates a virtual cross correlated clay silt sand + Z dataset.
TT.kde2d

Calculated the 2D probabilty density on an x-y grid.
TT.css2xy

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

Plot the vertices of a texture classification system.
TT.geo.set

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

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

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

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

TT env
TT.chemometrics.alr

Compute the additive log-ratio transformation of compositional data.
TT.phi2dia

Convert a soil particle phi value into diameter dia [micro-meters].
TT.set

Function to change / set the default package parameters.
TT.points.in.classes

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

Internal. Plot the edges (bare axis) of a soil texture triangle.
TT.normalise.sum.X

Normalises the sum of the X particle size classes.
TT.plot

Plot soil texture triangles / diagrams.
TT.xy2css

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

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

Inverse weighted distance interpolation on a grid.
TT.blr.tx.check

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

Determines the centroid of 1 polygon (in x-y coordinates).
TT.classes.tbl

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

Function to add a new default package parameters.
TT.axis.arrows

Internal. Plot the axis' arrows of a texture triangle plot.
TT.get

Function to retrieve / get the default package parameters.
TT.gen.op.set

Internal. Retrieve and set default values from options.
soiltexture-package

Functions for soil texture plot, classification and transformation
TT.blr.ps.lim

Internal. Create a tabular version of clay silt sand particle size limits.
TT.text.transf

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

Returns the table of vertices of a texture classification system.
TT.polygon.area

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

Internal. Retrieve and set default values for parameters (par() or not), when NULL.
TT.check.ps.lim

Internal. Check the consistency between 'base.ps.lim' and 'dat.ps.lim'.
TT.check.ps.lim.Xm

Internal. Check the consistency between 'base.ps.lim' and 'dat.ps.lim'.
TT.normalise.sum

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

Internal. Flexible version of ifelse.