Functions for Soil Texture Plot, Classification and Transformation

---

Documentation for package ‘soiltexture’ version 1.5.3

• DESCRIPTION file.
• User guides, package vignettes and other documentation.
• Package NEWS.

Help Pages

soiltextureInfo	Display and / or export system and package version information
soiltexture_gui	Text-based menu for plotting and classifying soil texture data
TT.add	Function to add a new default package parameters.
TT.baseplot	Internal. Create an empty plot scene for a texture triangle.
TT.chemometrics.alr	Compute the additive log-ratio transformation of compositional data.
TT.classes	Plot the texture classes polygons in a texture triangle plot.
TT.classes.tbl	Returns the table of classes of a texture classification system.
TT.contour	Wrapper for the contour() function adapted to texture triangles.
TT.data.test	Test the validity of some soil texture data table (3 particle size classes).
TT.data.test.X	Test the validity of some soil texture data table (X particle size classes).
TT.dataset	Genetates a virtual cross correlated clay silt sand + Z dataset.
TT.dia2phi	Convert a soil particle diameter dia [micro-meters] into phi = -log2(dia/1000)
TT.geo.get	Retrieve and return the geometrical parameters from a list of parameter values (NULL or not).
TT.get	Function to retrieve / get the default package parameters.
TT.grid	Plot a grid at regular texture intervals inside an existing soil texture triangle.
TT.image	Wrapper for the image() function adapted to texture triangles.
TT.iwd	Inverse weighted distance interpolation on a grid.
TT.kde2d	Calculated the 2D probabilty density on an x-y grid.
TT.locator	Interactive (mouse clic) retrieval the CLAY SILT SAND coordinate of points on a texture triangle.
TT.mahalanobis	Calculates the Mahalanobis distance between clay silt and sand.
TT.normalise.sum	Normalises the sum of the 3 particle size classes.
TT.normalise.sum.X	Normalises the sum of the X particle size classes.
TT.plot	Plot soil texture triangles / diagrams.
TT.points	Plot a soil texture data table as points on an existing texture plot.
TT.points.in.classes	Classify a table of soil texture data according to a soil texture triangle.
TT.set	Function to change / set the default package parameters.
TT.str	Stretch or reshape the range of value of some data set.
TT.text	Plot text labels for each values of a soil texture data table on an existing texture plot.
TT.text.transf	Log-linear transformation of a soil texture data table between 2 particle size systems (3 classes).
TT.text.transf.X	Log-linear transformation of a soil texture data table between 2 particle size systems (X classes).
TT.vertices.plot	Plot the vertices of a texture classification system.
TT.vertices.tbl	Returns the table of vertices of a texture classification system.