function [ p, l, u ] = minij_plu ( n ) %*****************************************************************************80 % %% MINIJ_PLU returns the PLU factors of the MINIJ matrix. % % Licensing: % % This code is distributed under the GNU LGPL license. % % Modified: % % 10 June 2011 % % Author: % % John Burkardt % % Parameters: % % Input, integer N, the order of the matrix. % % Output, real P(N,N), L(N,N), U(N,N) the PLU factors. % for j = 1 : n for i = 1 : n if ( i == j ) p(i,j) = 1.0; else p(i,j) = 0.0; end end end for j = 1 : n for i = 1 : j - 1 l(i,j) = 0.0; end for i = j : n l(i,j) = 1.0; end end for j = 1 : n for i = 1 : j u(i,j) = 1.0; end for i = j + 1 : n u(i,j) = 0.0; end end return end