convexHull: Construct the convex hull of a set of points

In henna: A Versatile Visualization Suite

Construct the convex hull of a set of points

Description

This function constructs the convex hull of a set of points.

Usage

convexHull(pointsDF, hullIndices = NULL)

Arguments

pointsDF	A data frame with the x and y coordinates of the points.
hullIndices	Precalculated hull indices. Default is NULL: hull indices are not provided, but they are calculated by convexHull.

Details

The points must be provided as a data frame with two columns.

Value

A data frame with two columns representing the points on the convex hull.

Examples

pointsDF <- data.frame(a = c(1, 2, 2, 3, 3, 4, 5, 6, 8, 6,
7, 8, 6, 8, 10, 3, 1),
b = c(2, 3, 4, 8, 5, 6, 5, 4, 8, 11, 13, 14, 2, 1, 2, 14, 9))
hull <- convexHull(pointsDF)

henna documentation built on Feb. 17, 2026, 9:08 a.m.