function gray_scott_pde_test ( )

%*****************************************************************************80
%
%% gray_scott_pde_test solves the 2D Gray-Scott reaction-diffusion equation.
%
%  Licensing:
%
%    This code is distributed under the GNU LGPL license.
%
%  Modified:
%
%    29 January 2021
%
%  Author:
%
%    John Burkardt
%
  timestamp ( );
  fprintf ( 1, '\n' );
  fprintf ( 1, 'gray_scott_pde_test:\n' );
  fprintf ( 1, '  Solve the 2D Gray-Scott reaction-diffusion PDE\n' );
  fprintf ( 1, '  (partial differential equation).\n' );

  nx = 251;
  ny = 251;
  nt = 150001;
  tmax = 1500.0;

  gray_scott_pde ( nx, ny, nt, tmax );
%
%  Terminate.
%
  fprintf ( 1, '\n' );
  fprintf ( 1, 'gray_scott_pde_test\n' );
  fprintf ( 1, '  Normal end of execution.\n' );
  timestamp ( );

  return
end
function timestamp ( )

%*****************************************************************************80
%
%% timestamp prints the current YMDHMS date as a timestamp.
%
%  Licensing:
%
%    This code is distributed under the GNU LGPL license.
%
%  Modified:
%
%    14 February 2003
%
%  Author:
%
%    John Burkardt
%
  t = now;
  c = datevec ( t );
  s = datestr ( c, 0 );
  fprintf ( 1, '%s\n', s );

  return
end
