% -*- texinfo -*-
% @deftypefn {Function File} {} tricontour (@var{tri}, @var{x}, @var{y}, @var{z}, @var{levels})
% @deftypefnx {Function File} {} tricontour (@var{tri}, @var{x}, @var{y}, @var{z}, @var{levels}, @var{linespec})
% Plot level curves for the values of @code{@var{z}} on a triangular mesh in 2D.
% The variable @var{tri} is the triangular meshing of the points
% @code{(@var{x}, @var{y})} which is returned from @code{delaunay}. The
% variable @var{levels} is a vector with the values of the countour levels.
% If @var{levels} is a scalar, then it corresponds to the number of
% level curves to be drawn. If exactly one level curve is desired, list
% the level twice in the vector @var{levels}.
% If given, the @var{linespec} determines the properties to use for the
% lines. The output argument @var{h} is the graphic handle to the plot.
% @seealso{plot, trimesh, delaunay}
% @end deftypefn