% -*- texinfo -*-
% @deftypefn {Function File} {@var{H} =} convhull (@var{x}, @var{y})
% @deftypefnx {Function File} {@var{H} =} convhull (@var{x}, @var{y}, @var{opt})
% Returns the index vector to the points of the enclosing convex hull. The
% data points are defined by the x and y vectors.
%
% A third optional argument, which must be a string, contains extra options
% passed to the underlying qhull command. See the documentation for the
% Qhull library for details.
%
% @seealso{delaunay, convhulln}
% @end deftypefn