function [ X, Y ] = spiral_xy ( nx, ny )

%*****************************************************************************80
%
%% spiral_xy(): node coordinates for the spiral reaction-diffusion equation.
%
%  Licensing:
%
%    This code is distributed under the MIT license.
%
%  Modified:
%
%    16 December 2020
%
%  Author:
%
%    John Burkardt
%
%  Input:
%
%    integer nx, ny: the number of rows and columns of nodes.
%
%  Output:
%
%    real X(nx,ny), Y(nx,ny): the node coordinates.
%
  x = linspace ( 0.0, +80.0, nx );
  y = linspace ( 0.0, +80.0, ny );

  [ X, Y ] = ndgrid ( x, y );

  return
end

