function [ a, b, c, seed ] = r83v_random ( m, n, seed )

%*****************************************************************************80
%
%% R83V_RANDOM randomizes an R83V matrix.
%
%  Discussion:
%
%    The R83V storage format is used for a tridiagonal matrix.
%    The subdiagonal is in A(min(M-1,N)).
%    The diagonal is in B(min(M,N)).
%    The superdiagonal is in C(min(M,N-1)).
%
%  Example:
%
%    An R83V matrix of order 3x5 would be stored:
%
%      B1  C1  **  **  **
%      A1  B2  C2  **  **
%      **  A2  B3  C3  **
%
%    An R83 matrix of order 5x5 would be stored:
%
%      B1  C1  **  **  **
%      A1  B2  C2  **  **
%      **  A2  B3  C3  **
%      **  **  A3  B4  C4
%      **  **  **  A4  B5
%
%    An R83 matrix of order 5x3 would be stored:
%
%      B1  C1  **
%      A1  B2  C2
%      **  A2  B3
%      **  **  A3
%      **  **  **
%
%  Licensing:
%
%    This code is distributed under the MIT license.
%
%  Modified:
%
%    01 February 2016
%
%  Author:
%
%    John Burkardt
%
%  Parameters:
%
%    Input, integer M, N, the order of the matrix.
%
%    Input, integer SEED, a seed for the random number generator.
%
%    Output, real A(min(M-1,N)), B(min(M,N)), C(min(M,N-1)), the R83V matrix.
%
%    Output, integer SEED, an updated seed for the random number generator.
%
  [ a, seed ] = r8vec_uniform_01 ( min ( m - 1, n     ), seed );
  [ b, seed ] = r8vec_uniform_01 ( min ( m,     n     ), seed );
  [ c, seed ] = r8vec_uniform_01 ( min ( m,     n - 1 ), seed );

  return
end
