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soiltexture (version 1.2.19)

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

1.2.19

License

AGPL (>= 3)

Maintainer

Julien MOEYS

Last Published

September 29th, 2014

Functions in soiltexture (1.2.19)

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

Convert any colors to hsv.

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

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

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

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

Returns the table of classes of a texture classification system.

TT.blr.tx.check

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

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

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

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

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

Internal. Retrieve and set default values from options.

TT.normalise.sum.X

Normalises the sum of the X particle size classes.

soiltexture-package

Functions for soil texture plot, classification and transformation

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

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

Function to change / set the default package parameters.

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

TT.text.transf.X

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

Plot the texture classes polygons in a texture triangle plot.

soiltextureInfo

Display and / or export system and package version information

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

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

TT.vertices.tbl

Returns the table of vertices of a texture classification system.

Function to retrieve / get the default package parameters.

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

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

Function to convert angle in degree to angle in radian.

TT.vertices.plot

Plot the vertices of a texture classification system.

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

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

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

TT.points.in.classes

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

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

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

Internal. Flexible version of ifelse.

TT.normalise.sum

Normalises the sum of the 3 particle size classes.

TT.polygon.centroids

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

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

TT.chemometrics.alr

Compute the additive log-ratio transformation of compositional data.

TT.polygon.area

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

Plot soil texture triangles / diagrams.

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

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

Inverse weighted distance interpolation on a grid.

Function to add a new default package parameters.

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.

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

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

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

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

Calculates the Mahalanobis distance between clay silt and sand.

Internal. Used in the plot axis drawings.