File: poisson_test.m

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% $Id: poisson_test.m,v 1.3 2004/02/06 09:47:29 geus Exp $
%

for n = [100, 300, 500]

   n
   tic
   L = poisson2d_kron(n);
   toc
   b = ones(n*n,1);
   tic
   [x,flag,relres,iter] = pcg(L, b, 1e-8, 2000, [], [], zeros(n*n,1));
   toc
   iter, relres, norm(b - L*x)/norm(b)

end