Skip to contents

Compute 2D convex hulls

Source: R/coord-methods.R
convex_hull2d.Rd

convex_hull2d() is a S3 generic for computing the convex hull of an object. It is implemented for Coord2D and Polygon2D objects using grDevices::chull() and returns a Polygon2D whose vertices are in counter-clockwise order.

Usage

convex_hull2d(x, ...)

# S3 method for class 'Coord2D'
convex_hull2d(x, ...)

# S3 method for class 'Polygon2D'
convex_hull2d(x, ...)

Arguments

x

An object to compute the convex hull of, such as a Coord2D or Polygon2D object.

...

Further arguments passed to or from other methods.

Value

A Polygon2D object representing the convex hull.

Examples

pts <- as_coord2d(x = rnorm(20), y = rnorm(20))
hull <- convex_hull2d(pts)
is_polygon2d(hull)
#> [1] TRUE
hull$is_convex
#> [1] TRUE
plot(hull)
points(pts)