function a = r8pbl_zeros ( n, ml )

%*****************************************************************************80
%
%% R8PBL_ZEROS zeros an R8PBL matrix.
%
%  Discussion:
%
%    The R8PBL storage format is for a symmetric positive definite band matrix.
%
%    To save storage, only the diagonal and lower triangle of A is stored,
%    in a compact diagonal format that preserves columns.
%
%    The diagonal is stored in row 1 of the array.
%    The first subdiagonal in row 2, columns 1 through ML.
%    The second subdiagonal in row 3, columns 1 through ML-1.
%    The ML-th subdiagonal in row ML+1, columns 1 through 1.
%
%    The matrix returned will be positive definite, but of limited
%    randomness.  The off diagonal elements are random values between
%    0 and 1, and the diagonal element of each row is selected to
%    ensure strict diagonal dominance.
%
%  Licensing:
%
%    This code is distributed under the MIT license.
%
%  Modified:
%
%    19 August 2015
%
%  Author:
%
%    John Burkardt
%
%  Parameters:
%
%    Input, integer N, the order of the matrix.
%    N must be positive.
%
%    Input, integer ML, the number of subdiagonals in the matrix.
%    ML must be at least 0 and no more than N-1.
%
%    Output, real A(ML+1,N), the R8PBL matrix.
%
  a = zeros ( ml + 1, n );

  return
end
