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From: | Bill Denney |
Subject: | Re: QR vs LU factorisation |
Date: | Mon, 30 Jun 2008 18:07:45 -0400 |
User-agent: | Thunderbird 2.0.0.14 (Windows/20080421) |
Dmitri A. Sergatskov wrote:
This is true, but some of us don't remember (or didn't know to begin with) our linear algebra to this depth.Just taking a step back. One seldom needs an inverse matrix. Usually it is some analytic expression, that has an inverse matrix, which has to be calculated numerically. Often this expression can be re-written to make use of QR (and SVD) decomposition. One good example is well documented in wsolve.m
Have a good day, Bill
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