% -*- texinfo -*-
% @deftypefn {Function File} {} sombrero (@var{n})
% Produce the familiar three-dimensional sombrero plot using @var{n}
% grid lines. If @var{n} is omitted, a value of 41 is assumed.
%
% The function plotted is
%
% @example
% z = sin (sqrt (x^2 + y^2)) / (sqrt (x^2 + y^2))
% @end example
% @seealso{surf, meshgrid, mesh}
% @end deftypefn