From: Elia <aa2004a@gmail.com> Path: news.mathworks.com!newsfeed-00.mathworks.com!webcrossing Newsgroups: comp.soft-sys.matlab Subject: Inverse of Large Sparse Matrix Message-ID: <ef4ebb1.-1@webcrossing.raydaftYaTP> Date: Sat, 24 Feb 2007 14:21:23 -0500 Lines: 16 NNTP-Posting-Host: 89.0.228.154 MIME-Version: 1.0 Content-Type: text/plain; charset="ISO-8859-1" Content-Transfer-Encoding: 8bit Xref: news.mathworks.com comp.soft-sys.matlab:394088 Hi All, I need find the inverse of a very large sparse martix. The size of the matrix is near 16000^2. The problem ofcourse is that Matlab yields : "Out of memory" ,when I use B=inv(A); I know that there are some clever algorithms to exploit the fact that the matrix is sparse and most of its values are zeros and to find the inverse in some other way without exceeding the limit of memory but I dont know how. I tired to use the operator '\' but it didnt work either. If somebody knows how to do it , please help . Thanks, Elia.