TT.polygon.centroids {soiltexture}R Documentation

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

Description

Determines the centroid of 1 non-intersecting polygon (in x-y coordinates). Used to determine the centroid of each texture class in the texture triangle onces its clay silt sand coordinates have been converted to x-y coordinates. 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".

Usage

TT.polygon.centroids(pol.x, pol.y)

Arguments

pol.x

Vector of numericals. X coordinates of each vertices of the polygon.

pol.y

Vector of numericals. Y coordinates of each vertices of the polygon.

Value

Returns a vector of 2 numericals: x and y coordinates of the polygon's centroid. Vector items are names "x" and "y".

Author(s)

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]


[Package soiltexture version 1.3.1 Index]