TT.polygon.area

Vector of numericals. X coordinates of each vertices of thepolygon.

pol.x

Vector of numericals. Y coordinates of each vertices of thepolygon.

pol.y

Determines the area of 1 non-intersecting polygon (in x-ycoordinates). Used by TT.polygon.centroids(). pol.x[1]:pol.y[1]is supposed different from pol.x[n]:pol.y[n] (i.e. the polygonis NOT closed).After "http://local.wasp.uwa.edu.au/~pbourke/geometry/polyarea/Calculating The Area And Centroid Of A Polygon. Written byPaul Bourke, July 1988".

"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. Many (> 15) texture triangles from all around the world are predefined in the package. A simple text based graphical user interface is provided: soiltexture_gui().

Julien MOEYS

soiltexture

Functions for Soil Texture Plot, Classification and
Transformation

Julien Moeys

Wei Shangguan

Rainer Petzold

Budiman Minasny

Bogdan Rosca

Nic Jelinski

Wiktor Zelazny

Rodolfo Marcondes Silva Souza

Jose Lucas Safanelli

Alexandre ten Caten

TT.polygon.area function

<dl> <dt>pol.x</dt>
<dd>Vector of numericals. X coordinates of each vertices of the</dd>polygon. <dt>pol.y</dt>
<dd>Vector of numericals. Y coordinates of each vertices of the</dd>polygon.</dl>

Arguments

Julien Moeys [aut, cre], Wei Shangguan [ctb], Rainer Petzold [ctb], Budiman Minasny [ctb], Bogdan Rosca [ctb], Nic Jelinski [ctb], Wiktor Zelazny [ctb], Rodolfo Marcondes Silva Souza [ctb], Jose Lucas Safanelli [ctb], Alexandre ten Caten [ctb]

Author

Determines the area of 1 non-intersecting polygon (in x-y

coordinates). Used by TT.polygon.centroids(). pol.x[1]:pol.y[1]

is supposed different from pol.x[n]:pol.y[n] (i.e. the polygon

is NOT closed).

After "http://local.wasp.uwa.edu.au/~pbourke/geometry/polyarea/

Calculating The Area And Centroid Of A Polygon. Written by

Paul Bourke, July 1988".

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

<dl>



 <dt>pol.x</dt>
<dd>Vector of numericals. X coordinates of each vertices of the

polygon.</dd>



 <dt>pol.y</dt>
<dd>Vector of numericals. Y coordinates of each vertices of the

polygon.</dd>



</dl>

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

Description

Usage

Value

Arguments

Author