e254.m

matlab算法集 matlab算法集

%-----------------------------------------------------------------------
% Example 2.5.4 Equilibration
%-----------------------------------------------------------------------
   clc                 
   clear
   fprintf ('Example 2.5.4: Equilibration\n')
   A = [1 -1 ; 1000 1000];
   show ('A',A)
   B = inv(A);
   show ('inv(A)',B)
   show ('||A||',norm(A,inf))
   show ('||inv(A)||',norm(B,inf))
   show ('K(A)',cond(A,inf))
   A = [1 -1 ; 1 1];
   show ('new A',A)
   B = inv(A);
   show ('new inv(A)',B)
   show ('new K(A)',cond(A,inf))
%-----------------------------------------------------------------------