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soiltexture (version 1.2.9)

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 triangles "Bodenkundliche Kartieranleitung 1994", "SEA 1974" and "TGL 1985"; Soil Survey of England and Wales; Australian triangle; Belgian triangle; Canadian triangle; ISSS triangle; Romanian triangle; Polish triangle.

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Version

Install

install.packages('soiltexture')

Monthly Downloads

1,036

Version

1.2.9

License

AGPL (>= 3)

Maintainer

Julien MOEYS

Last Published

March 8th, 2012

Functions in soiltexture (1.2.9)

TT.polygon.centroids

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

Internal. Create an empty plot scene for a texture triangle.

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

Calculates the Mahalanobis distance between clay silt and sand.

Internal. Retrieve and set default values from options.

TT.points.in.classes

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

Function to convert angle in degree to angle in radian.

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

Plot the texture classes polygons in a texture triangle plot.

Function to add a new default package parameters.

Convert any colors to hsv.

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

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

Function to retrieve / get the default package parameters.

soiltexture-package

Functions for soil texture plot, classification and transformation

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

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

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

Returns the table of classes of a texture classification system.

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

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

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

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

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

TT.polygon.area

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

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

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

TT.check.ps.lim

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

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.

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

Internal. Used in the plot axis drawings.

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

TT.text.transf.X

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

Plot soil texture triangles / diagrams.

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

TT.blr.tx.check

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

TT.chemometrics.alr

Compute the additive log-ratio transformation of compositional data.

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

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

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

TT.vertices.tbl

Returns the table of vertices of a texture classification system.

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

TT.vertices.plot

Plot the vertices of a texture classification system.

Inverse weighted distance interpolation on a grid.

TT.normalise.sum

Normalises the sum of the 3 particle size classes.

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

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

TT.text.transf.Xm

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

TT.check.ps.lim.Xm

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

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

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

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

Internal. Flexible version of ifelse.

Function to change / set the default package parameters.

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