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Re: Leasqr matrix singular to machine precision
From: |
Francesco Potorti` |
Subject: |
Re: Leasqr matrix singular to machine precision |
Date: |
Thu, 21 Feb 2008 23:46:49 +0100 |
>As I could not solve the system I was asking why and found from the
>example leasqrdemo that I can give more points than the number of
>unknown (an overestimated system is possible !).
Sure it is possible! That is the whole point of least square
optimization.
>If I try to modify the inital guess it doesn't converge and arrive to
>imaginary values...
Try with more points, and with different initial guesses. Try with a
simpler problem, and change it gradually. Try to start with something
that you know has a solution.
>Now I need help ! Does 4 variables are too much ?
Definitely not.
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- Leasqr matrix singular to machine precision, Archambault Fabien, 2008/02/20
- Re: Leasqr matrix singular to machine precision, Archambault Fabien, 2008/02/20
- Re: Leasqr matrix singular to machine precision, Archambault Fabien, 2008/02/21
- Re: Leasqr matrix singular to machine precision,
Francesco Potorti` <=
- Re: Leasqr matrix singular to machine precision, Archambault Fabien, 2008/02/22
- Re: Leasqr matrix singular to machine precision, Francesco Potorti`, 2008/02/22
- Re: Leasqr matrix singular to machine precision, Archambault Fabien, 2008/02/22
- Re: Leasqr matrix singular to machine precision, Przemek Klosowski, 2008/02/25
- Re: Leasqr matrix singular to machine precision, Archambault Fabien, 2008/02/25
- Re: Leasqr matrix singular to machine precision, Dmitri A. Sergatskov, 2008/02/25
- Re: Leasqr matrix singular to machine precision, Archambault Fabien, 2008/02/26
- Re: Leasqr matrix singular to machine precision, Doug Stewart, 2008/02/26
- Re: Leasqr matrix singular to machine precision, Archambault Fabien, 2008/02/27
- Re: Leasqr matrix singular to machine precision, Francesco Potorti`, 2008/02/27