annotate util/SL_A.m @ 39:8f734534839a

(none)
author idamnjanovic
date Mon, 14 Mar 2011 15:35:01 +0000
parents fc395272d53e
children 8e660fd14774
rev   line source
idamnjanovic@24 1 function y = SL_A(A, mode, m, n, x, I, dim)
idamnjanovic@24 2 %%% Sparco to SparseLab implicit matix conversion
idamnjanovic@24 3 % Centre for Digital Music, Queen Mary, University of London.
idamnjanovic@24 4 % This file copyright 2009 Ivan Damnjanovic.
idamnjanovic@24 5 %
idamnjanovic@24 6 % This program is free software; you can redistribute it and/or
idamnjanovic@24 7 % modify it under the terms of the GNU General Public License as
idamnjanovic@24 8 % published by the Free Software Foundation; either version 2 of the
idamnjanovic@24 9 % License, or (at your option) any later version. See the file
idamnjanovic@24 10 % COPYING included with this distribution for more information.
idamnjanovic@24 11 %
idamnjanovic@24 12 % This is auxilary function to allow implicit matrices from SPARCO
idamnjanovic@24 13 % to be used with SparsLab solvers
idamnjanovic@24 14
idamnjanovic@24 15 if (mode == 1)
idamnjanovic@1 16
idamnjanovic@24 17 u = zeros(dim, 1);
idamnjanovic@24 18 u(I) = x;
idamnjanovic@24 19 y = A(u,1);
idamnjanovic@1 20
idamnjanovic@24 21 elseif (mode == 2)
idamnjanovic@24 22
idamnjanovic@24 23 x2 = A(x,2);
idamnjanovic@24 24 y = x2(I);
idamnjanovic@24 25
idamnjanovic@24 26 end
idamnjanovic@24 27
idamnjanovic@24 28 end