|MATLAB Function Reference|
n-D convex hull
K = convhulln(X)
returns the indices
K of the points in
X that comprise the facets of the convex hull of
X is an
n array representing
m points in
n-D space. If the convex hull has
p facets then
[K,v] = convhulln(X)
also returns the volume
v of the convex hull.
Plotting the output of
convhulln depends on the value of
n = 2, use
plotas you would for
n = 3, you can use
trisurfto plot the output. The calling sequence is
patchto plot the output. For an example, see Tessellation and Interpolation of Scattered Data in Higher Dimensions in the MATLAB documentation.
convhulln is based on Qhull . It uses the Qhull joggle option (
'QJ'). For information about
qhull, see http://www.geom.umn.edu/software/qhull/. For copyright information, see http://www.geom.umn.edu/software/download/COPYING.html.
 Barber, C. B., D.P. Dobkin, and H.T. Huhdanpaa, "The Quickhull Algorithm for Convex Hulls," ACM Transactions on Mathematical Software, Vol. 22, No. 4, Dec. 1996, p. 469-483. Available in HTML format at http://www.acm.org/ pubs/citations/journals/toms/1996-22-4/p469-barber/ and in PostScript format at ftp://geom.umn.edu/pub/software/qhull-96.ps.
 National Science and Technology Research Center for Computation and Visualization of Geometric Structures (The Geometry Center), University of Minnesota. 1993.