| in.polygon {sgeostat} | R Documentation |
Checks if points are in the interior of a polygon.
in.polygon(x0, y0, x, y)
x0 |
coordinates of points to check |
y0 |
see x0 |
x |
coordinates defining the polygon |
y |
see x |
Uses a simple points-in-polygon check combined with the polygon
function.
Polygon is closed automatically.
comp1 |
Description of `comp1' |
comp2 |
Description of `comp2' |
Albrecht Gebhardt <agebhard@uni-klu.ac.at>
Follows an idea from algorithm 112 from CACM (available at http://www.netlib.org/tomspdf/112.pdf)
in.convex.hull, polygon, in.chull
in.polygon(c(0,1),c(0,1),c(0,1,0,-1),c(-1,0,1,0)) # should give: TRUE FALSE