Re: ill-conditioned matrix
- To: mathgroup at smc.vnet.net
- Subject: [mg43474] Re: ill-conditioned matrix
- From: "Robert Nowak" <robert.nowak at ims.co.at>
- Date: Thu, 18 Sep 2003 05:38:37 -0400 (EDT)
- References: <bk9jvu$2d$1@smc.vnet.net>
- Sender: owner-wri-mathgroup at wolfram.com
suppose you have the matrix equation below m.x=b even if m is singular the following will give a unique and perhaps meaningful solution x=PseudoInverse[m].b will even work with rectangular (non square) matrices in this case the solution will be the least square solution to the over / under determined system (linear least square fit equivalent). regards robert "arash yavari" <arashkhan at yahoo.com> wrote in message news:bk9jvu$2d$1 at smc.vnet.net... > Hello, > > Does anybody know what the best way of multiplying > ill-conditioned matrices in Mathematica is? I also > need to solve a linear system with an ill-conditioned > representing matrix. What is the most efficient and > accurate way of doing this by Mathematica? Thanks! > > Regards, > Arash > > __________________________________ > Do you Yahoo!? > Yahoo! SiteBuilder - Free, easy-to-use web site design software > http://sitebuilder.yahoo.com >