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From: "Matthew " <matthew.caulfield@ntlworld.com>
Newsgroups: comp.soft-sys.matlab
Subject: Inversion of a matrix
Date: Wed, 17 Mar 2010 22:37:23 +0000 (UTC)
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Hi there, I am trying to invert the following matrix (please copy and paste into an ordinary text document to see the rows and columns).  My lecturer says it is possible using a tool which deals with sparse matrices, but I can't find it anywhere.  I have had a look at other posts and there are some different methods for inverting matrices but none of them seem to work.

Please help!!! :(

A22 =

   -0.0281    0.0235    0.3866   -0.9402    0.1406    8.8444   -0.1241         0   -0.0457    0.0002   -0.0496    0.0268
   -0.0276   -0.0298   -1.2050    0.9590   -0.0092   -0.0079   -9.1597         0    0.0955   -0.0637    0.0183   -0.0794
   -0.0397    0.0162   -0.9453   -0.4574   -0.0629   -0.2427   -0.0665         0   -0.0049    0.0003   -0.0440   -0.0391
    0.0060    0.0004    0.1798   -0.6805   -0.0509    0.0045    0.0153         0   -0.0019   -0.0015   -0.0236    0.0211
    0.0177    0.0020   -0.0828   -0.0359   -0.2436   -0.0328   -0.0078         0    1.2443    0.0051   -0.0052   -0.0045
         0         0    1.0011    0.0064    0.0934         0         0         0         0         0         0         0
         0         0         0    0.9987   -0.0683         0         0         0         0         0         0         0
         0         0         0    0.0686    1.0031         0         0         0         0         0         0         0
   -0.0077    0.0023    0.0131    0.0029   -0.0933    0.0039    0.0008         0   -3.2212    0.0281    0.0004    0.0003
   -0.0058   -0.3049   -0.1954   -0.0209    2.2201    0.0011    0.0001         0    2.4050   -5.3327    0.0001    0.0010
   10.0618   -0.0176   17.8017   -6.0152    1.5821   -0.0036   -0.0357         0   -0.0111   -0.0014  -13.6668    0.0122
    0.0161   10.0275   -6.0314  -17.8927   -0.5327    0.0435   -0.0333         0    0.0007   -0.0002    0.0109  -13.7022