in.polygon: In-Polygon test

In sgeostat: An Object-Oriented Framework for Geostatistical Modeling in S+

Description

Checks if points are in the interior of a polygon.

Usage

in.polygon(x0, y0, x, y)

Arguments

x0	coordinates of points to check
y0	see x0
x	coordinates defining the polygon
y	see x

Details

Uses a simple points-in-polygon check combined with the polygon function.

Polygon is closed automatically.

Value

comp1	Description of ‘comp1’
comp2	Description of ‘comp2’

Author(s)

Albrecht Gebhardt <[e-mail]>

References

Follows an idea from algorithm 112 from CACM (available at http://www.netlib.org/tomspdf/112.pdf)

See Also

in.convex.hull, polygon, in.chull

Examples

in.polygon(c(0,1),c(0,1),c(0,1,0,-1),c(-1,0,1,0))
# should give: TRUE FALSE

sgeostat documentation built on May 1, 2019, 6:31 p.m.