| in.chull {sgeostat} | R Documentation |
Checks if points are in the interior of a convex hull.
in.chull(x0, y0, x, y)
x0 |
coordinates of points to check |
y0 |
see x0 |
x |
coordinates defining the convex hull |
y |
see x |
Uses a simple points-in-polygon check combined with the chull
function.
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.chull(c(0,1),c(0,1),c(0,1,0,-1),c(-1,0,1,0)) # should give: TRUE FALSE