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soiltexture (version 1.2.13)

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

930

Version

1.2.13

License

AGPL (>= 3)

Maintainer

Julien MOEYS

Last Published

January 14th, 2014

Functions in soiltexture (1.2.13)

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

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

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

Convert any colors to hsv.

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

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

Inverse weighted distance interpolation on a grid.

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

TT.polygon.area

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

TT.chemometrics.alr

Compute the additive log-ratio transformation of compositional data.

Function to convert angle in degree to angle in radian.

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

TT.points.in.classes

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

Plot the texture classes polygons in a texture triangle plot.

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

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

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

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

Function to retrieve / get the default package parameters.

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

TT.polygon.centroids

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

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

TT.normalise.sum.X

Normalises the sum of the X particle size classes.

soiltexture-package

Functions for soil texture plot, classification and transformation

TT.check.ps.lim

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

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

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

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

TT.normalise.sum

Normalises the sum of the 3 particle size classes.

TT.vertices.tbl

Returns the table of vertices of a texture classification system.

Internal. Used in the plot axis drawings.

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

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

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

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

TT.blr.tx.check

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

TT.text.transf.X

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

Calculates the Mahalanobis distance between clay silt and sand.

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

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

TT.vertices.plot

Plot the vertices of a texture classification system.

Internal. Flexible version of ifelse.

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

Returns the table of classes of a texture classification system.

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

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

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

Internal. Retrieve and set default values from options.

Function to change / set the default package parameters.

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

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

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

Function to add a new default package parameters.

Plot soil texture triangles / diagrams.