function a = r83s_indicator ( m, n )

%*****************************************************************************80
%
%% R83S_INDICATOR sets an R83S indicator matrix.
%
%  Discussion:
%
%    The R83S storage format is used for a tridiagonal scalar matrix.
%    The vector A(3) contains the subdiagonal, diagonal, and superdiagonal
%    values that occur on every row.
%    RGE A(I,J) = R83S A(I-J+2).
%
%  Example:
%
%    Here is how an R83S matrix of order 5, stored as (A1,A2,A3), would
%    be interpreted:
%
%      A2  A1   0   0   0
%      A3  A2  A1   0   0
%       0  A3  A2  A1   0 
%       0   0  A3  A2  A1
%       0   0   0  A3  A2
%
%  Licensing:
%
%    This code is distributed under the MIT license. 
%
%  Modified:
%
%    05 September 2015
%
%  Author:
%
%    John Burkardt
%
%  Parameters:
%
%    Input, integer M, N, the order of the matrix.
%
%    Output, real A(3), the R83S matrix.
%
  a = [ 3.0; 2.0; 1.0 ]

  return
end