From: "Bruno Luong" <b.luong@fogale.findmycountry>
Newsgroups: comp.soft-sys.matlab
Subject: Re: finding a matrix used in matrix transformation
Date: Tue, 9 Nov 2010 18:42:03 +0000 (UTC)
Organization: FOGALE nanotech
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"Matt J " <mattjacREMOVE@THISieee.spam> wrote in message <ibc2ic$mjm$>...

> If you're sure that Q is singular, then you should be able to recover m as an eigenvector of Q with eigenvalue 0. See "doc eig"

Or simply using NULL which gives a basis of the null space (at the accuracy of the floating point).