= MATLAB convhull =

The '''`convhull`''' function calculates the indices of the convex hull encapsulating a set.

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== Usage ==

{{{
% Create a rectangular grid.
[X,Y,Z] = meshgrid(linspace(-3,3,20), linspace(-3,3,20), linspace(-3,3,20));

% Identify the points within a region of integration.
roi = (X>=0 & X<=sqrt(4-Z.^2-Y.^2)) & (Y>=0 & Y<=sqrt(4-Z.^2) & (Z>=0 & Z<=1));

% Calculate the convex hull of this ROI.
K = convhull(X(roi), Y(roi), Z(roi));
}}}

`K` is now a 3-column matrix representing the indices that form the hull. This can be used with [[MATLAB/TriSurf|trisurf]] like:

{{{
trisurf(K, X(roi), Y(roi), Z(roi));
}}}



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CategoryRicottone